[Federal Register Volume 67, Number 244 (Thursday, December 19, 2002)]
[Rules and Regulations]
[Pages 77653-77666]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 02-31754]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 2001-NE-26-AD; Amendment 39-12984; AD 2002-25-08]
RIN 2120-AA64


Airworthiness Directives; General Electric Company (GE) CF6-45, -
50, -80A, -80C2, and -80E1 Turbofan Engines

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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SUMMARY: This amendment supersedes three existing airworthiness 
directives (AD's), that are applicable to GE CF6-45, -50, -80A, -80C2, 
and -80E1 turbofan engines. Those AD's currently require specific 
handling of the GE CF6 series high pressure compressor rotor (HPCR) 
stage 3-9 spools during a fluorescent penetrant inspection process, and 
initial and repetitive ultrasonic and eddy current inspections of 
certain HPCR stage 3-9 spools for cracks. This amendment removes the AD 
that requires special handling of the spools during fluorescent-
penetrant inspection, and adjusts and combines the initial and 
repetitive inspection requirements, currently listed in two AD's, into 
one AD for the HPCR stage 3-9 spool. This amendment aligns repetitive 
inspection requirements with the more stringent initial inspection 
requirements mandated by AD 2000-16-12, Amendment 39-11868 (65 FR 
50623, August 21, 2000) and terminates AD 95-18-14, Amendment 39-9361 
(60 FR 46216, September 6, 1995) that is no longer necessary. The 
actions specified by this AD are intended to prevent cracks, which can 
cause separation of the HPCR stage 3-9 spool and possible uncontained 
engine failure.

DATES: Effective January 23, 2003. The incorporation by reference of 
certain publications listed in the regulations is approved by the 
Director of the Federal Register as of January 23, 2003.

ADDRESSES: The service information referenced in this AD may be 
obtained from General Electric Company via Lockheed Martin Technology 
Services, 10525 Chester Road, Suite C, Cincinnati, Ohio 45215, 
telephone (513) 672-8400, fax (513) 672-8422. This information may be 
examined, by appointment, at the Federal Aviation Administration (FAA), 
New England Region, Office of the Regional Counsel, 12 New England 
Executive Park, Burlington, MA; or at the Office of the Federal 
Register, 800 North Capitol Street, NW., suite 700, Washington, DC.

FOR FURTHER INFORMATION CONTACT: Chris Gavriel, Aerospace Engineer, 
Engine Certification Office, FAA, Engine and Propeller Directorate, 12 
New England Executive Park, Burlington, MA 01803-5299; telephone (781) 
238-7147; fax (781) 238-7199.

SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal 
Aviation Regulations (14 CFR part 39) by superseding AD 95-18-14, 
Amendment 39-9361 (60 FR 46216, September 6, 1995); AD 99-24-15, 
Amendment 39-11440 (64 FR 66554, November 29, 1999); and AD 2000-16-12, 
Amendment 39-11868 (65 FR 50623, August 21, 2000); which are applicable 
to GE CF6-45, -50, -80A, -80C2, and -80E1 turbofan engines, was 
published in the Federal Register on June 12, 2002, (67 FR 40239). That 
action proposed to combine the requirements of AD 99-24-15 and AD 2000-
16-12 with the following additional changes to:
    [sbull] Adopt the accelerated initial inspection requirements of AD 
2000-16-12 to spools acquiring 7,000 cycles-since-new (CSN) or more in 
service after July 28, 2001,
    [sbull] Relax initial compliance requirement for the CF6-45, -50, 
and CF6-80A 13-inch billet spools to make them consistent with 9 and 
10-inch billet spools,
    [sbull] Add repetitive inspection requirements to the existing one-
time inspection requirement for the CF6-80C and -80E series engine 
spool web and hub-to-web transition areas,
    [sbull] Replace engine shop visit inspection threshold limits for 
certain spools with cyclic limits,
    [sbull] Add a time limit for slot bottom inspection for 13-inch 
billet spools for CF6-45, -50, -80A engines and for 9-inch and 10-inch 
billet spools for CF6-45, -50, -80A, and -80C engines,
    [sbull] Add a time limit for the initial inspection and add repeat 
inspection intervals for stage 3-5 slot bottom inspection for certain 
spools,
    [sbull] Add a time limit for one-time inspection of 8-inch billet 
2-piece spools, and
    [sbull] Provide for an alternative modular inspection for the slot 
bottoms.

[[Page 77654]]

    The action was prompted by a report of an uncontained failure of an 
HPCR 3-9 spool.
    The inspections must be done in accordance with the following GE 
alert service bulletins (ASB's):
    [sbull] ASB GE CF6-50 S/B 72-A1108, Revision 5, dated October 2, 
2002.
    [sbull] ASB GE CF6-50 S/B 72-A1131, Revision 4, dated October 2, 
2002.
    [sbull] ASB GE CF6-50 S/B 72-A1157, Revision 4, dated October 2, 
2002.
    [sbull] ASB GE CF6-80A S/B 72-A0678, Revision 5, dated October 2, 
2002.
    [sbull] ASB GE CF6-80A S/B 72-A0691, Revision 5, dated October 2, 
2002.
    [sbull] ASB GE CF6-80A S/B 72-A0719, Revision 5, dated October 2, 
2002.
    [sbull] ASB GE CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 
2002.
    [sbull] ASB GE CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 
2002.
    [sbull] ASB GE CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 
2002.
    [sbull] ASB GE CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 
2002.
    [sbull] ASB GE CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 
2002.
    [sbull] ASB GE CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 
2002.

Comments

    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. Due consideration has been given to 
the comments received.

Web Inspection May Require Unscheduled Removals of Engines

    Several commenters state that inspection of the web per Alert 
Service Bulletin 72-A0848, after January 27, 2003, at 3,500 CSN is a 
decrease from inspection requirements prior to that date. The 
commenters feel that this requirement will force operators to remove 
engines off wing to do the inspection in order to comply with this 
proposed AD.
    The FAA agrees. Based on information received from several 
commenters, this requirement will have an adverse economic and 
operational impact on several operators. We have reviewed a risk 
analysis that includes an extension of the web inspection requirement 
by six months, relative to the date proposed in the NPRM, and find that 
the new risk is still acceptable under the guidelines appropriate for 
this type of failure. As a result, the requirement has been extended by 
six months.

Request To Add a FAX Number for the Reporting Requirements

    One commenter requests that a FAX number be added to the reporting 
requirements. Due to time differences around the world, the time 
allotted for reporting may not be sufficient for other means of 
communication
    The FAA agrees. We have added a facsimile number to the reporting 
requirements.

Request To Make Editorial Changes to Wording in the Requirements of the 
AD

    One commenter requests certain word changes, such as replacing 
``by'' with ``at'', replacing ``within'' with ``before'', etc., and 
adding certain paragraph headings. These changes are requested to make 
the AD requirements consistent and more understandable.
    The FAA partially agrees. We consider the consistency of wording 
and the readability of the requirements of the AD to be of highest 
concern. However, we also feel that many of the suggested changes are 
stylistic and do not affect the technical accuracy or readability of 
the AD. We have made some of the requested changes to ensure 
consistency among the requirements and to improve the readability of 
the requirements of the AD.

Requested Corrections to CF6-50 8-Inch Requirements

    Several commenters request that the title for paragraph (d) be 
corrected from ``CF6-508-inch'' to ``CF6-50 8-inch.'' The same 
commenters also request that the FAA correct service bulletin 
identifications in paragraphs (f), (g), and (j).
    The FAA agrees. The title for paragraph (d) and the service 
bulletin numbers in paragraphs (f), (g), and (j) have been corrected.

Request To Change the Definition of an Engine Shop Visit

    Several commenters request that the definition of an engine shop 
visit be changed to exclude compressor top and bottom case removals for 
variable stator vane bushing replacements. The commenters feel the 
inclusion was made to add another condition to the conditions already 
identified as not constituting engine shop visits (ESV's).
    The FAA agrees. We have changed the ESV definition paragraph to 
exclude the induction of an engine into the shop for the purpose of 
replacing the variable stator vane bushing.

Requested Clarification of the Requirements for Reinstallation of CF6-
50 Spools

    One commenter feels that further explanation on the meaning of 
paragraph (c)(7) is needed.
    The FAA agrees. Addition of a heading ``Spool Reinstallation 
Limit'' in this paragraph helps in clarifying the intent of this 
paragraph. Furthermore, as the paragraph states, an engine with a spool 
that has 10,500 CSN or more may not be installed (i.e. returned to 
service). The paragraph does not require the removal of an installed 
engine that has a spool with 10,500 CSN or more.

Request To Clarify Paragraph (a)(3)(ii) of This AD

    One commenter requests clarification of paragraph (a)(3)(ii). The 
commenter feels that paragraph (a)(3)(ii) is necessary to do paragraphs 
(a)(3)(i) and (a)(3)(iii). The commenter feels that paragraphs 
(a)(3)(i) and (a)(3)(iii) are redundant to (a)(3)(ii) and can be 
deleted to simplify the requirements.
    The FAA does not agree with deleting paragraphs (a)(3)(i) and 
(a)(3)(iii). A spool that is exposed as a piece part (paragraph 
(a)(3)(i)) is also exposed as a rotor (paragraph (a)(3)(ii)). Likewise, 
a spool that requires a hub inspection in accordance with ASB CF6-50 S/
B 72-A1108 hub inspection (paragraph (a)(3)(iii)) must be exposed at 
least to a rotor level {(a)(3)(ii){time}  in order to do a module level 
inspection. In this sense, (a)(3)(i) and (a)(3)(iii) are redundant to 
(a)(3)(ii). However, each condition represents a common but distinct 
and different level of planned engine maintenance, therefore it was 
advisable to address each condition specifically for clarity.

Request To Clarify That Paragraph (a)(4)(iii) Is Correct

    One commenter requests that the FAA verify that paragraph 
(a)(4)(iii) and Table 5 are correct. The commenter feels that Table 5 
of the AD causes a jump in the inspection interval. The commenter 
provides a correction to Table 5 of the AD to correct a perceived error 
in that Table.
    The FAA has not been able to confirm the commenter's findings. The 
cyclic intervals for the Table 5 requirements are A; 3,500 cycles, B; 
3,000 cycles, C; 3,000 cycles, D; 2,500 cycles, E; 2,500 cycles, F; 
2,000 cycles, and G; 2,000 cycles. These intervals are as intended.

Concern About Misinterpretation of the Inspection Deadline

    One commenter states that one of the requirements of this proposed 
rule may be misread as extending the inspection deadline of AD 2000-16-
12 to beyond July 28, 2001. The commenter also suggests that if all the 
high-risk spools have been inspected, the proposed rule should be 
expedited, since one year has passed since the deadline of AD 2000-16-
12.

[[Page 77655]]

    The FAA agrees with the commenter on the need to expedite issuance 
of this AD. While the statement in the Discussion Section of the 
preamble of the proposal may be misinterpreted, the preamble is not 
regulatory and in fact, even the structure of the preamble changes when 
an NPRM is converted into a final rule. However, we have made changes 
to the statement in the Supplementary Information section to clarify 
the intent of this final rule. The intent of the proposed rule is to 
apply the same requirement on the population of the spools that would 
acquire 7,000 CSN after July 28, 2001. In regard to the comment 
inquiring if all spools have been inspected, we are not aware of any 
spool with 7,000 CSN or more that has not been inspected as required by 
AD 2000-16-12.

Request To Include Fluorescent Penetrant Inspection (FPI) Requirements

    One commenter suggests that AD 95-18-14 that addresses FPI of the 
3-9 spool should be included, since Standard Practices are only a 
suggestion and not a law. The commenter makes this comment out of 
concern that under this proposed rule the benefit of an additional 
inspection is eliminated.
    The FAA does not agree. The requirements promulgated by AD 95-18-14 
ensure that a spool is properly wetted internally prior to the FPI. 
Although FPI of the 3-9 spool is desired for the areas not affected by 
this AD, FPI is not the best technique for the inspection program 
established by this AD. While FPI is effective only for detection of 
surface cracks, the combination of ultrasonic and eddy current 
inspections required by this AD provide both surface and subsurface 
inspections that are of equal or greater sensitivity than FPI. The FPI 
required by AD 95-18-14 was an emergency measure instituted in 1995 
after discovery of cracking in the disk web area, an area not then 
covered by ultrasonic and eddy current inspections. These inspection 
methods were subsequently developed and incorporated into the 
inspection plan. Additionally, AD 95-18-14 did not prescribe inspection 
intervals, only inspection techniques, therefore, the benefit of AD 95-
18-14 was not considered in the risk analysis associated with the 
current AD's.

Additional Spool Part Numbers (P/N's) as a Result of Unrelated Repairs

    One commenter expresses a concern that additional spool P/N's, 
which have been generated due to unrelated repairs on spools that are 
subject to the inspection requirements of this AD, are not being 
captured by the AD. The commenter feels that these P/N's should be 
added to the AD. The commenter raises this issue to ensure that spools 
with P/N's that were not included in the proposed rule are not excluded 
from this inspection program.
    The FAA agrees. The new P/N's will be incorporated in this AD. 
However, their incorporation does not increase the originally affected 
spool population size.

New Revisions to the Applicable Service Bulletins

    One commenter, the manufacturer, advises the FAA that the 
applicable service bulletins may be revised for nontechnical reasons. 
The commenter feels that the latest revisions of the service bulletins 
need to be incorporated into the AD.
    The FAA agrees. The revision numbers and dates have been 
incorporated into this final rule.

Request To Change Paragraph (j)(2)

    One commenter requests that paragraph (j)(2) be changed to ensure 
that the hub and web receive an initial inspection if either of the two 
areas were not previously inspected. The same commenter suggests that 
paragraph (j)(2) be split into two paragraphs to properly specify the 
inspection deadlines for the hub and for the web, now that the 
originally proposed deadlines have been changed to accommodate the 
economic and operational burden associated with the web inspection.
    The FAA agrees. We have changed paragraph (j)(2) of this AD. 
Because of the new schedule requirements, two paragraphs, each with its 
own schedule, are appropriate and the change has been made.

Request To Clarify ``Replace Before Further Flight'' Requirement on 
CF6-50 Spools

    One commenter observes that the ``replace before further flight'' 
requirements for the CF6-50 spools include the reject limits of service 
bulletin CF6-50 S/B 72-A1131, while the preceding paragraph does not 
include this service bulletin. The commenter raised this comment out of 
concern that the inspection requirement per service bulletin CF6-50 S/B 
72-A1131 was not identified in the preceding step.
    The FAA partially agrees. In the current text, an inference may be 
made that spools must be inspected to all three referenced bulletins at 
each repeat inspection. The spool disposition requirements apply to 
results of all prescribed inspections specified in all the steps of the 
pertinent paragraph in the AD and not just to the preceding step. 
Therefore, for further clarification a heading ``Spool Disposition'' 
has been inserted.

Request To Add a Heading of ``Spool Reinstallation Limit''

    One commenter requests that the heading Spool Reinstallation Limit 
be added before the applicable paragraphs. The commenter feels that the 
addition will clarify the intent of the paragraphs.
    The FAA agrees. We have added the heading to the applicable 
paragraphs.

Concern Over the Availability of Training and Equipment

    One commenter expresses concern that the requirements of ASB CF6-
80C2 72-A0934, Revision 3, can not be done because the equipment and 
training necessary to carry out this inspection are not available at 
this time. The commenter makes this comment out of concern that the 
prescribed inspections could not be done, per the proposed rule 
timetables, since there was no scheduled delivery of the necessary 
equipment and associated training.
    The FAA agrees. However, this issue has been addressed by the 
engine manufacturer. Both equipment and training will be available in 
time to enable the commenter to comply with the requirements of this 
AD, therefore, no changes have been made.

Request To Change the Definition of a Shop Visit

    One commenter states that the introduction of an engine into the 
shop solely for the 3-9 spool inspection should not be considered a 
shop visit. The request is made so that the stage 3-5 dovetail slot 
bottom inspection for the CF6-80C2 13-inch billet spools would not be 
forced if the spools could otherwise comply using the module level 
inspection. The hub and web inspections can be done at module level 
merely by removing the fan module from the core. The slot bottom 
inspection requires additional disassembly to remove the compressor top 
case. The request is made to avoid this additional disassembly.
    The FAA disagrees. Material testing and stress analysis indicate 
that the dovetail slot bottoms have a dwell-fatigue limitation. 
Accordingly, the rule requires initial slot bottom inspection at the 
earliest exposure (piece-part exposure or rotor exposure, which is 
realized upon top case removal) but not later than the next required 
inspection of the hub and/or web for dwell fatigue

[[Page 77656]]

cracking. As the cracking mode is the same for all areas, the FAA can 
not apply lesser criteria to the slot bottoms.

Request To Include the 3-5 Dovetail Slot Bottom Inspection at Piece-
Part Level Only

    One commenter requests that the repeat inspection of the CF6-80C 
13-inch billet spool stage 3-5 dovetail slot bottoms be required at 
piece-part exposure only. Accomplishment of this inspection at a module 
level would require, at a minimum, the removal of the compressor top 
case.
    The FAA disagrees for reasons stated in the answer to the previous 
comment.

Request To Clarify the Reference Date for the Initial Inspection

    One commenter states that there is no reference date for the 
initial inspection required in paragraph (a)(3) from which the operator 
is to determine items (i), (ii), and (iii) under this paragraph. The 
commenter uses the example that item (i) requires an inspection at the 
first piece-part exposure (PPE) after 1,000 CSN. The spool may have had 
several PPE's after 1,000 CSN in its life but never had the requirement 
to inspect at those visits. The commenter requests clarification of the 
reference date in this paragraph to ensure the proper time set.
    The FAA disagrees. The proposal does not contain new requirements. 
It consolidates requirements of existing airworthiness directives, 
which include paragraph (a)(3). In the past, if an opportunity to have 
a PPE arose as the commenter states, the requirement of AD 99-24-15 
would have been applicable. Additionally, the cyclic requirements of 
steps (i) and (ii) are associated with the cyclic life of the spool and 
not an independent cyclic interval. The third step (iii) also does not 
need the association with the effective date of this AD. Incorporation 
of the change the commenter proposes would conflict with requirements 
of the existing AD relative to the dovetail inspection. The proposed 
change would also affect additional paragraphs of the rule, not 
identified by the commenter, where similar arguments can be made.

Potential Confusion Over Requirements for Piece-Part Inspections

    One commenter, the manufacturer, informs the FAA that a potential 
for confusion exists regarding the requirements for the one-time hub 
inspection of 8-inch billet spools. The existing wording in certain 
ASB's could be interpreted such that a modular level inspection of the 
hub could be performed, when in fact, piece-part inspection using 
Procedure A is required to achieve the intended level of safety. The 
manufacturer has revised the appropriate ASB's to add this 
clarification and suggests additional wording be added to this rule to 
ensure the correct procedure is used.
    The FAA agrees. We have clarified the hub inspection requirements 
for affected spools in paragraphs (d)(1), (h)(1), (k)(1), and (m)(1).

Request To Correct P/N's and SN's for CF6-50 16-Inch and 13-Inch 
Billets

    The same commenter states that the part number and serial number 
relationships for the CF6-50 16-inch and 13-inch billet spools relative 
to Table 2 were incorrect in the information that it sent to the FAA 
and need to be corrected in paragraphs (a) and (b), respectively.
    The FAA agrees. We have made the appropriate changes to the final 
rule.
    After careful review of the available data, including the comments 
noted above, the FAA has determined that air safety and the public 
interest require the adoption of the rule with the changes described 
previously. The FAA has determined that these changes will neither 
increase the economic burden on any operator nor increase the scope of 
the AD.

Cost Analysis

    There are approximately 3,147 engines of the affected design in the 
worldwide fleet. The FAA estimates that 1,289 engines installed on 
airplanes of U.S. registry would be affected by this proposed AD. The 
FAA also estimates that it would take approximately 238 work hours per 
engine to perform the proposed actions. The average labor rate is $60 
per work hour. Required parts would cost approximately $35,000 per 
engine. In addition, because of the previous AD actions, the FAA 
estimates that only 72 percent (928 engines) of the engines installed 
on airplanes of U.S. registry would be affected. Based on these 
figures, the total cost of the proposed AD on U.S. operators is 
estimated to be $45,731,840.

Regulatory Analysis

    This final rule does not have federalism implications, as defined 
in Executive Order 13132, because it would not have a substantial 
direct effect on the States, on the relationship between the national 
government and the States, or on the distribution of power and 
responsibilities among the various levels of government. Accordingly, 
the FAA has not consulted with state authorities prior to publication 
of this final rule.
    For the reasons discussed above, I certify that this action (1) is 
not a ``significant regulatory action'' under Executive Order 12866; 
(2) is not a ``significant rule'' under the DOT Regulatory Policies and 
Procedures (44 FR 11034, February 26, 1979); and (3) will not have a 
significant economic impact, positive or negative, on a substantial 
number of small entities under the criteria of the Regulatory 
Flexibility Act. A final evaluation has been prepared for this action 
and it is contained in the Rules Docket. A copy of it may be obtained 
by contacting the Rules Docket at the location provided under the 
caption ADDRESSES.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, pursuant to the authority delegated to me by the 
Administrator, the Federal Aviation Administration amends part 39 of 
the Federal Aviation Regulations (14 CFR part 39) as follows:

PART 39--AIRWORTHINESS DIRECTIVES

    1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

    2. Section 39.13 is amended by removing Amendments 39-9361 (60 FR 
46216, September 6, 1995), 39-11440 (64 FR 66554, November 29, 1999), 
and 39-11868 (65 FR 50623, August 21, 2000), and by adding a new 
airworthiness directive, Amendment 39-12984, to read as follows:

2002-25-08 General Electric Company (GE): Docket No. 2001-NE-26-AD. 
Supersedes AD 95-18-14, Amendment 39-9361; AD 99-24-15, Amendment 
39-11440; and AD 2000-16-12, Amendment 39-11868.

    Applicability:This airworthiness directive (AD) is applicable to 
GE CF6-45, -50, -80A, -80C2, and -80E1 turbofan engines with high 
pressure compressor rotor (HPCR) stage 3-9 spools with part numbers 
(P/N's) listed in the following Table 1 installed:

[[Page 77657]]



                                 Table 1
------------------------------------------------------------------------
              Engine model                   HPCR stage 3-9 spool P/N
------------------------------------------------------------------------
CF6-45/50 Series Engines...............  9136M89G02, 9136M89G03,
                                          9136M89G06, 9136M89G07,
                                          9136M89G08, 9136M89G09,
                                          9136M89G17, 9136M89G18,
                                          9136M89G19, 9136M89G21,
                                          9136M89G22, 9136M89G27,
                                          9136M89G29, 9253M85G01,
                                          9253M85G02, 9273M14G01,
                                          9331M29G01.
CF6-80A Series Engines.................  9136M89G10, 9136M89G11,
                                          9136M89G20, 9136M89G21,
                                          9136M89G22, 9136M89G27,
                                          9136M89G28
CF6-80C2 Series Engines................  1333M66G01, 1333M66G03,
                                          1333M66G07, 1333M66G09,
                                          1333M66G10, 1781M52P01,
                                          1781M52P02, 1781M53G01,
                                          1781M53G02 1781M53G03,
                                          1781M53G04, 1781M53G05,
                                          1781M53G06, 1781M53G07,
                                          1781M53G08, 1781M53G09,
                                          1781M53G10, 1854M95P01,
                                          1854M95P02, 1854M95P03,
                                          1854M95P04, 1854M95P05,
                                          1854M95P06, 1854M95P07,
                                          1854M95P08, 9380M28P05.
CF6-80E1 Series Engines................  1669M22G01, 1669M22G03,
                                          1782M22G01, 1782M22G02,
                                          1782M22G04.
------------------------------------------------------------------------

    These engines are installed on, but not limited to, Airbus A300, 
A310, and A330 series, Boeing 747 and 767 series, and McDonnell 
Douglas DC-10 and MD-11 series airplanes.

    Note 1: This AD applies to each engine identified in the 
preceding applicability provision, regardless of whether it has been 
modified, altered, or repaired in the area subject to the 
requirements of this AD. For engines that have been modified, 
altered, or repaired so that the performance of the requirements of 
this AD is affected, the owner/operator must request approval for an 
alternative method of compliance in accordance with paragraph (p) of 
this AD. The request should include an assessment of the effect of 
the modification, alteration, or repair on the unsafe condition 
addressed by this AD; and, if the unsafe condition has not been 
eliminated, the request should include specific proposed actions to 
address it.

    Compliance: Compliance with this AD is required as indicated, 
unless already done.
    To detect cracks, which can cause separation of the HPCR stage 
3-9 spool and possible uncontained engine failure, do the following:

CF6-45 and -50 16-Inch Billet Spools

    (a) For CF6 HPCR stage 3-9 spool, part numbers (P/N's) 
9136M89G02 and 9136M89G06; and for P/N's 9136M89G08, 9253M85G02, 
9273M14G01, 9331M29G01 with serial numbers (SN's) listed in the 
following Table 2, do the following:

                                                                         Table 2
--------------------------------------------------------------------------------------------------------------------------------------------------------
 
--------------------------------------------------------------------------------------------------------------------------------------------------------
MPOE3486              MPOE3487              MPOE3488              MPOE3489              MPOE3490              MPOE3491              MPOE3492
MPOG3832              MPOG3833              MPOG3834              MPOG3835              MPOG3836              MPOG3837              MPOG3838
MPOG3839              MPOG3840              MPOG3841              MPOG3842              MPOG3843              MPOG3844              MPOG3845
MPOG3846              MPOG3847              MPOG3848              MPOG3850              MPOG3851              MPOG5228              MPOG5230
MPOG5231              MPOG5232              MPOG6216              MPOG6727              MPOG6728              MPOG6729              MPOG6730
MPOG6731              MPOG6732              MPOG6733              MPOG6735              MPOG6736              MPOG6738              MPOG6739
MPOG6740              MPOG6741              MPOG6742              MPOG6743              MPOG6744              MPOG6745              MPOG6746
MPOG7713              MPOG7714              MPOG7715              MPOG7716              MPOG7717              MPOG7718              MPOG7719
MPOG7720              MPOG7721              MPOG7722              MPOG7723              MPOG7724              MPOG7725              MPOG7726
MPOG7727              MPOG7728              MPOG7729              MPOG7730              MPOG7731              MPOG7732              MPOG7733
MPOG7734              MPOG7735              MPOG7736              MPOG7737              MPOG7738              MPOG7739              MPOG7740
MPOG7741              MPOG7742              MPOG7743              MPOG7744              MPOG7819              MPOG7820              MPOG7821
MPOG7822              MPOG7823              MPOG7824              MPOG7825              MPOG7826              MPOG7827              MPOG7828
MPOG7829              MPOG7830              MPOG7831              MPOG7832              MPOG7833              MPOG7834              MPOG7835
MPOG7836              MPOG7837              MPOG7838              MPOG7839              MPOG8822              MPOG8823              MPOG8824
MPOG8825              MPOG8826              MPOG8827              MPOG8828              MPOG8829              MPOG8830              MPOG8831
MPOG8832              MPOG8833              MPOG8834              MPOG8835              MPOG8836              MPOG8837              MPOG9185
MPOG9186              MPOH0289              MPOH0290              MPOH0291              MPOH0292              MPOH0293              MPOH0294
MPOH0295              MPOH0296              MPOH0297              MPOH0298              MPOH0299              MPOH0300              MPOH0301
MPOH0302              MPOH0303              MPOH0304              MPOH0305              MPOH1805              MPOH2040              MPOH2041
MPOH2042              MPOH2043              MPOH2044              MPOH2045              MPOH2046              MPOH2047              MPOH2048
MPOH2049              MPOH2050              MPOH2051              MPOH2052              MPOH2053              MPOH2054              MPOH2055
MPOH2056              MPOH2057              MPOH2058              MPOH2059              MPOH2060              MPOH2061              MPOH2062
MPOH2829              MPOH2830              MPOH2831              MPOH2832              MPOH2833              MPOH2834              MPOH2835
MPOH2836              MPOH2837              MPOH2838              MPOH2839              MPOH2840              MPOH2841              MPOH2842
MPOH2843              MPOH2844              MPOH2845              MPOH2846              MPOH2847              MPOH2848              MPOH2849
MPOH2850              MPOH2851              MPOH2852              MPOH2853              MPOH2854              MPOH2855              MPOH2856
MPOH2857              MPOH2858              MPOH4307              MPOH4308              MPOH4309              MPOH4310              MPOH4311
MPOH4312              MPOH4313              MPOH5277              MPOH5278              MPOH5279              MPOH5280              MPOH5281
MPOH5282              MPOH5283              MPOH5520              MPOH5530              MPOH5531              MPOH5532              MPOH5533
MPOH5534              MPOH5535              MPOH5536              MPOH5537              MPOH5538              MPOH5539              MPOH5540
MPOH5541              MPOH5542              MPOH5543              MPOH5544              MPOH5545              MPOH5546              MPOH5547
MPOH5548              MPOH5549              MPOH5550              MPOH5551              MPOH5552              MPOH5553              MPOH5554
MPOH7020              MPOH7021              MPOH7022              MPOH7023              MPOH7024              MPOH7025              MPOH7026
MPOH7027              MPOH7028              MPOH7030              MPOH7960              MPOH7965              MPOH7966              MPOH7967
MPOH7968              MPOH7969              MPOH7970              MPOH7971              MPOH7972              MPOH7973              MPOH7974
MPOH7975              MPOH8638              MPOH8639              MPOH8640              MPOH8641              MPOH8642              MPOH8643
MPOH8644              MPOH8645              MPOH8646              MPOH8647              MPOH8648              MPOH8649              MPOH8650
MPOH8651              MPOH8652              MPOH8653              MPOH8654              MPOH8655              MPOH8656              MPOH8657
MPOH8658              MPOH8659              MPOH8677              MPOH8678              MPOH8679              MPOH8680              MPOH8682
MPOH8683              MPOH8684              MPOJ1796              MPOJ1797              MPOJ1798              MPOJ1799              MPOJ1800

[[Page 77658]]

 
MPOJ1801              MPOJ1803              MPOJ1804              MPOJ1806              MPOJ1930              MPOJ1931              MPOJ1932
MPOJ1933              MPOJ1934              MPOJ1935              MPOJ1936              MPOJ1938              MPOJ1939              MPOJ1940
MPOJ1941              MPOJ1942              MPOJ1943              MPOJ1944              MPOJ1945              MPOJ1946              MPOJ1947
MPOJ1948              MPOJ1949              MPOJ1950              MPOJ1951              MPOJ1953              MPOJ1954              MPOJ1955
MPOJ1956              MPOJ1957              MPOJ1958              MPOJ2420              MPOJ2421              MPOJ2422              MPOJ2423
MPOJ2424              MPOJ2425              MPOJ2426              MPOJ2427              MPOJ2428              MPOJ2429              MPOJ2430
MPOJ2431              MPOJ2432              MPOJ2433              MPOJ2434              MPOJ2435              MPOJ2436              MPOJ2437
MPOJ2438              MPOJ2439              MPOJ2440              MPOJ2441              MPOJ2442              MPOJ2443              MPOJ2444
MPOJ2445              MPOJ2446              MPOJ2447              MPOJ2448              MPOJ2449              MPOJ2450              MPOJ4173
MPOJ4174              MPOJ5185              MPOJ5186              MPOJ6035              MPOJ6036              MPOJ6039              MPOJ6040
MPOJ6041              MPOJ6042              MPOJ6043              MPOJ6044              MPOJ6045              MPOJ6046              MPOJ6047
MPOJ6048              MPOJ6049              MPOJ6050              MPOJ6051              MPOJ6052              MPOJ6053              MPOJ6054
MPOJ6055              MPOJ6056              MPOJ6057              MPOJ6058              MPOJ6059              MPOJ6060              MPOJ6061
MPOJ6062              MPOJ6063              MPOJ6064              MPOJ6065              MPOJ6066              MPOJ6067              MPOJ6068
MPOJ6500              MPOJ6501              MPOJ6502              MPOJ6503              MPOJ6505              MPOJ6506              MPOJ6507
MPOJ6508              MPOJ6509              MPOJ6510              MPOJ6511              MPOJ6512              MPOJ6513              MPOJ6514
MPOJ6515              MPOJ6516              MPOJ6517              MPOJ7632              MPOJ7633              MPOJ7634              MPOJ7635
MPOJ7636              MPOJ7637              MPOJ7638              MPOJ7639              MPOJ7640              MPOJ7641              MPOJ7642
MPOJ7643              MPOJ8046              MPOJ8047              MPOJ8048              MPOJ8049              MPOJ8050              MPOJ8051
MPOJ9308              MPOJ9309              MPOJ9310              MPOJ9311              MPOJ9312              MPOJ9313              MPOJ9314
MPOJ9315              MPOK1233              MPOK1234              MPOK1235              MPOK1236              MPOK1237              MPOK1238
MPOK1239              MPOK1240              MPOK1824              MPOK1825              MPOK1826              MPOK1827              MPOK1828
MPOK1829              MPOK1830              MPOK1831              MPOK1832              MPOK2694              MPOK2695              MPOK3067
MPOK3068              MPOK3069              MPOK3070              MPOK3071              MPOK4659              MPOK4660              MPOK4661
MPOK4662              MPOK4663              MPOK4664              MPOK4665              MPOK4666              MPOK4667              MPOK5082
MPOK5083              MPOK5084              MPOK5085              MPOK5086              MPOK5087              MPOK5088              MPOK5520
MPOK5521              MPOK5522              MPOK5955              MPOK5956              MPOK5957              MPOK5958              MPOK5959
MPOK5960              MPOK5961              MPOK5962              MPOK5963              MPOK5964              MPOK6247              MPOK6248
MPOK6249              MPOK6250              MPOK6251              MPOK6252              MPOK6253              MPOK6254              MPOK6255
MPOK6256              MPOK6257              MPOK6715              MPOK6716              MPOK6823              MPOK6824              MPOK6825
MPOK6826              MPOK6827              MPOK6828              MPOK6829              MPOK6830              MPOK6831              MPOK7226
MPOK7227              MPOK7228              MPOK7229              MPOK7230              MPOK7231              MPOK7232              MPOK7233
MPOK7234              MPOM2128              MPOM2129              MPOM2130              MPOM2131              MPOM2132              MPOM2133
MPOM2134              MPOM2135              MPOM2136              MPOM2137              MPOM2138              MPOM2357              MPOM2358
MPOM2359              MPOM2360              MPOM2361              MPOM2362              MPOM2363              MPOM2364              MPOM2365
MPOM2366              MPOM2461              MPOM2462              MPOM5521              MPOM5522              MPOM5523              MPOM5524
MPOM5525              MPOM5526              MPOM5527              MPOM5528              MPOM5529              MPOM5530              MPOM5531
MPOM5532              MPOM5533              MPOM5534              MPOM5535              MPOM5536              MPOM5537              MPOM6151
MPOM6152              MPOM6153              MPOM6154              MPOM6155              MPOM6156              MPOM6157              MPOM6158
MPOM6159              MPOM6160              MPOM6161              MPOM6162              MPOM7087              MPOM7088              MPOM7089
MPOM7091              MPOM7092              MPOM7093              MPOM7094              MPOM7095              MPOM7096              MPOM7097
MPOM7098              MPOM7099              MPOM7100              MPOM7101              MPOM7102              MPOM7103              MPOM7104
MPOM7105              MPOM7106              MPOM7107              MPOM7108              MPOM7109              MPOM8297              MPOM8298
MPOM8299              MPOM8300              MPOM8301              MPOM8302              MPOM9246              MPOM9257              MPOM9258
MPOM9259              MPOM9260              MPOM9261              MPOM9262              MPOM9265              MPOM9721              MPOM9722
MPOM9723              MPON0051              MPON0052              MPON0053              MPON0055              MPON0056              MPON0057
MPON0058              MPON0059              MPON0060              MPON0061              MPON0062              MPON0063              MPON0064
MPON0065              MPON0066              MPON0067              MPON0068              MPON0069              MPON0073              MPON0074
MPON0075              MPON0076              MPON1077              MPON1078              MPON1079              MPON1080              MPON1081
MPON1082              MPON1084              MPON1085              MPON1086              MPON1087              MPON1088              MPON1089
MPON1090              MPON1091              MPON1092              MPON1093              MPON1094              MPON1095              MPON1096
MPON1097              MPON1098              MPON1099              MPON1100              MPON1642              MPON4250              MPON4252
MPON4254              MPON4255              MPON4256
--------------------------------------------------------------------------------------------------------------------------------------------------------

Initial Inspection

    (1) If the spool has not already been inspected using one of the 
alert service bulletins (ASB's) or service bulletins (SB's) listed 
in Column A of the following Table 3; OR a combination of one 
procedure from Column B and one from Column C; OR a combination of 
one procedure from Column D and one from Column E, inspect hub and 
bore in accordance with alert service bulletin
    (ASB) CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002, 
and the following compliance times:

                                                     Table 3
----------------------------------------------------------------------------------------------------------------
      CF6-45 and -50 SB No.                 Procedures (70-32-XX) in Standard Practices Manual GEK9250
----------------------------------------------------------------------------------------------------------------
            Column A                   Column B            Column C            Column D            Column E
----------------------------------------------------------------------------------------------------------------
SB 72-888, Revision 3, dated      70-32-09, Revision  70-32-10, 71,       70-32-13,           70-32-14, TR 70-
 January 31, 1991.                 71, dated October   Revision dated      Temporary           26, dated August
                                   1, 1995.            October 1, 1995.    Revision (TR), 70-  26, 1996.
                                                                           25, dated August
                                                                           26, 1996.
SB 72-888, Revision 4, dated      70-32-09, Revision  70-32-10, Revision  70-32-13, Revision  70-32-14, Revision
 March 28, 1991.                   72, dated           72, dated           72, dated           72, dated
                                   November 15, 1996.  November 15, 1996.  November 15, 1996.  November 15,
                                                                                               1996.

[[Page 77659]]

 
SB 72-888, Revision 5, dated      70-32-09, Revision  70-32-10, Revision  70-32-13, Revision  70-32-14, Revision
 November 7, 1994.                 74, dated May 1,    74, dated May 1,    73, dated           73, dated
                                   1998.               1998.               November 1, 1997.   November 1, 1997.
SB 72-888, Revision 6, dated      ..................  70-32-10, Revision  70-32-13, Revision  70-32-14, Revision
 December 22, 1995.                                    75, dated           75, dated           75, dated
                                                       December 15, 1998.  December 15, 1998.  December 15,
                                                                                               1998.
SB 72-1000, Original dated        ..................  ..................  70-32-13, TR 70-    70-32-14, TR 70-
 December 14, 1990.                                                        41, dated           42, dated
                                                                           February 10, 1999.  February 10,
                                                                                               1999.
SB 72-1000, Revision 1, dated     ..................  ..................  70-32-13, Revision  70-32-14, Revision
 March 28, 1991.                                                           76, dated May 15,   76, dated May 15,
                                                                           1999.               1999.
SB 72-1000, Revision 2, dated     ..................  ..................  70-32-17, TR 70-    70-32-18, TR 70-
 September 9, 1993.                                                        39, dated           40, dated
                                                                           December 15, 1998.  December 15,
                                                                                               1998.
SB 72-1000, Revision 3, dated     ..................  ..................  70-32-17, Revision  70-32-18, Revision
 December 22, 1995.                                                        76, dated May 15,   76, dated May 15,
                                                                           1999.               1999.
SB 72-1108, Original, dated       ..................  ..................  70-32-17, TR 70-    70-32-18, TR 70-
 November 6, 1995.                                                         47, dated October   48, dated October
                                                                           28, 1999.           28, 1999.
SB 72-1108, Revision 1, dated                                                                 ..................
 July 29, 1996.
ASB 72-A1108, Revision 2, dated                                                               ..................
 October 28, 1999.
ASB 72-A1108, Revision 3, dated                                                               ..................
 November 12, 1999.
ASB 72-A1108, Revision 4, dated                                                               ..................
 June 6, 2001.
ASB CF6-50 S/B 72-A1108,                                                                      ..................
 Revision 5, dated October 2,
 2002.
----------------------------------------------------------------------------------------------------------------

    (i) For spools with greater than 3,500 cycles-since-new (CSN) on 
the effective date of this AD, inspect before further flight.
    (ii) For spools with 3,500 or fewer CSN, on the effective date 
of this AD, inspect at the first piece-part exposure (PPE) after 
1,000 CSN or before 3,500 CSN, whichever occurs earlier.
    (2) For spools that have not been inspected using ASB CF6-50 S/B 
72-A1131, Revision 4, dated October 2, 2002, or an earlier revision 
of ASB CF6-50 S/B 72-A1131 or SB 72-1131, inspect the web and hub-
to-web transition areas in accordance with the requirements of ASB 
CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, at the first 
PPE after 1,000 CSN, but before 4,000 additional cycles in-service 
(CIS) after the effective date of this AD.
    (3) For spools that have not been inspected using ASB CF6-50 S/B 
72-A1157, Revision 4, dated October 2, 2002, or an earlier revision 
of ASB CF6-50 S/B 72-A1157, inspect the stage 3-5 dovetail slot 
bottoms in accordance with the requirements of ASB CF6-50 S/B 72-
A1157, Revision 4, dated October 2, 2002, at the earliest of:
    (i) The first PPE after 1000 CSN, or
    (ii) The first HPC rotor exposure after 1000 CSN, or
    (iii) The next required inspection to ASB CF6-50 S/B 72-A1108, 
Revision 5, dated October 2, 2002.

Repetitive Inspection

    (4) For spools that have already been inspected using one of the 
ASB's or SB's listed in Column A of Table 3; OR a combination of one 
procedure from Column B AND one from Column C; OR a combination of 
one procedure from Column D AND one from Column E, reinspect the hub 
and bore in accordance with the requirements of ASB CF6-50 S/B 72-
A1108, Revision 5, dated October 2, 2002, and the stage 3-5 dovetail 
slot bottoms in accordance with ASB CF6-50 S/B 72-A1157, Revision 4, 
dated October 2, 2002, at the earliest of:
    (i) Each PPE with more than 1,000 cycles-since-last-inspection 
(CSLI) and 3,500 CSN, or
    (ii) From July 29, 2001 through January 27, 2003, before the 
cycle limits of the following Table 4:

                                 Table 4
------------------------------------------------------------------------
         CSN at last inspection                Repeat inspection by
------------------------------------------------------------------------
(A) 6,000 or fewer CSN.................  3,500 CSLI.
(B) 6,001 to 7,000 CSN.................  9,500 CSN.
(C) 7,001 to 8,000 CSN.................  2,500 CSLI.
(D) 8,001 to 8,500 CSN.................  10,500 CSN.
(E) 8,501 or more CSN..................  2,000 CSLI.
------------------------------------------------------------------------

    (iii) After January 27, 2003, before the cycle limits of the 
following Table 5:

                                Table 5.
------------------------------------------------------------------------
         CSN at last inspection                Repeat inspection by
------------------------------------------------------------------------
(A) 5,000 or fewer CSN.................  3,500 CSLI.
(B) 5,001 to 5,500 CSN.................  8,500 CSN.
(C) 5,501 to 6,500 CSN.................  3,000 CSLI.
(D) 6,501 to 7,000 CSN.................  9,500 CSN.
(E) 7,001 to 8,000 CSN.................  2,500 CSLI.
(F) 8,001 to 8,500 CSN.................  10,500 CSN.
(G) 8,501 or more CSN..................  2,000 CSLI.
------------------------------------------------------------------------

Spool Disposition

    (5) If inspection findings equal or exceed the reject limits 
established by ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 
2002; or ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002; 
or ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, 
replace spool before further flight.

CF6-45 and -50 13-inch Billet Spools

    (b) For CF6 HPC Rotor Stage 3-9 Spool, P/N's 9136M89G03, 
9136M89G07, 9136M89G09, 9136M89G17, 9136M89G18, 9253M85G01, and for 
P/N's 9136M89G08, 9253M85G01, 9273M14G01, and 9331M29G01 with serial 
numbers that are not listed in Table 2, do the following:

Initial Inspection

    (1) If the spool has greater than 7,000 CSN on the effective 
date of this AD and has not

[[Page 77660]]

already been inspected using one of the ASB's or SB's listed in 
Column A of Table 3; OR a combination of one procedure from Column B 
AND one from Column C; OR a combination of one procedure from Column 
D AND one from Column E, inspect hub and bore in accordance with ASB 
CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002 before 
further flight.
    (2) If the spool has 7,000 or fewer CSN on the effective date of 
this AD and has not already been inspected using one of the ASB's or 
SB's listed in Column A of Table 3; OR a combination of one 
procedure from Column B AND one from Column C; OR a combination of 
one procedure from Column D AND one from Column E, inspect hub and 
bore in accordance with ASB CF6-50 S/B 72-A1108, Revision 5, dated 
October 2, 2002, at the earliest of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first engine shop visit (ESV) after 4,000 CSN, or
    (iii) From July 29, 2001, through January 27, 2003, before 7,000 
CSN, and after January 27, 2003, before 4,000 CSN.
    (3) For spools that have not been inspected using ASB CF6-50 S/B 
72-A1131, Revision 4, dated October 2, 2002, or an earlier revision 
of ASB CF6-50 S/B 72-A1131 or SB 72-1131, inspect the web and hub-
to-web transition areas in accordance with the requirements of ASB 
CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, at the 
earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) Within 4,000 additional CIS after the effective date of 
this AD.
    (4) For spools that have not been inspected using ASB CF6-50 S/B 
72-A1157, Revision 4, dated October 2, 2002, or an earlier revision 
of ASB CF6-50 S/B 72-A1157, inspect the stage 3-5 dovetail slot 
bottoms in accordance with the requirements of ASB CF6-50 S/B 72-
A1157, Revision 4, dated October 2, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) Within 4,000 additional CIS after the effective date of 
this AD.

Repetitive Inspection

    (5) For spools that have already been inspected using one of the 
ASB's or SB's listed in Column A of Table 3; OR a combination of one 
procedure from Column B AND one from Column C; OR a combination of 
one procedure from Column D AND one from Column E, reinspect the hub 
and bore in accordance with the requirements of ASB CF6-50 S/B 72-
A1108, Revision 5, dated October 2, 2002, at the earliest of:
    (i) Each PPE with more than 1,000 CSLI and 4,000 CSN, or
    (ii) Each ESV with more than 2,000 CSLI and 4,000 CSN, or
    (iii) Before 4,000 CSLI.

Spool Disposition

    (6) If inspection findings equal or exceed the reject limits 
established by ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 
2002; or ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002; 
or ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, 
replace spool before further flight.

CF6-45 and -50 9 and 10-Inch Billet Spools

    (c) For CF6 HPCR stage 3-9 spool, P/N's 9136M89G19, 9136M89G21, 
9136M89G22 and 9136M89G27, do the following:

Initial Inspection

    (1) If the spool has greater than 7,000 CSN on the effective 
date of this AD and has not already been inspected using one of the 
ASB's or SB's listed in Column A of Table 3; OR a combination of one 
procedure from Column B AND one from Column C; OR a combination of 
one procedure from Column D AND one from Column E, inspect the hub 
and bore in accordance with ASB CF6-50 S/B 72-A1108, Revision 5, 
dated October 2, 2002 before further flight.
    (2) If the spool has 7,000 or fewer CSN on the effective date of 
this AD, and has not already been inspected using one of the ASB's 
or SB's listed in Column A of Table 3; OR a combination of one 
procedure from Column B AND one from Column C; OR a combination of 
one procedure from Column D AND one from Column E, inspect the hub 
and bore in accordance with ASB CF6-50 S/B 72-A1108, Revision 5, 
dated October 2, 2002, at the earliest of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 3,000 CSN, or
    (iii) From July 29, 2001 through January 27, 2003, before 7,000 
CSN, and after January 27, 2003, before 3,500 CSN.
    (3) For spools that have not been inspected using ASB CF6-50 S/B 
72-A1131, Revision 4, dated October 2, 2002, or an earlier revision 
of ASB CF6-50 S/B 72-A1131 or SB CF6-50 S/B 72-1131, inspect the web 
and hub-to-web transition areas in accordance with the requirements 
of ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, at 
the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) Within 4,000 additional CIS after the effective date of 
this AD.
    (4) For spools that have not been inspected using ASB CF6-50 S/B 
72-A1157, Revision 4, dated October 2, 2002, or an earlier revision 
of ASB CF6-50 S/B 72-A1157, inspect the stage 3-5 dovetail slot 
bottom in accordance with the requirements of ASB CF6-50 S/B 72-
A1157, Revision 4, dated October 2, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) Within 4,000 additional CIS after the effective date of 
this AD.

Repetitive Inspection

    (5) For spools that have already been inspected using one of the 
ASB's or SB's listed in Column A of Table 3; OR a combination of one 
procedure from Column B AND one from Column C; OR a combination of 
one procedure from Column D AND one from Column E, reinspect the hub 
and bore in accordance with the requirements of ASB CF6-50 S/B 72-
A1108, Revision 5, dated October 2, 2002, at the earliest of:
    (i) Each PPE with more than 1,000 CSLI and 3,500 CSN, or
    (ii) From July 29, 2001, through January 27, 2003, before the 
cycle limits of the following Table 6, or:

                                 Table 6
------------------------------------------------------------------------
         CSN at last inspection                    Reinspect by
------------------------------------------------------------------------
(A) 3,500 or fewer CSN.................  7,000 CSN.
(B) 3,501 to 6,000 CSN.................  3,500 CSLI.
(C) 6,001 to 7,000 CSN.................  9,500 CSN.
(D) 7,001 to 8,000 CSN.................  2,500 CSLI.
(E) 8,001 to 8,500 CSN.................  10,500 CSN.
(F) 8,501 or more CSN..................  2,000 CSLI.
------------------------------------------------------------------------

    (iii) After January 27, 2003, before the cycle limits of Table 
5.

Spool Disposition

    (6) If inspection findings equal or exceed the reject limits 
established by ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 
2002; or ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002; 
or ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002; 
replace spool before further flight.

Spool Reinstallation Limit

    (7) After the effective date of this AD, do not install any 
engine that has an HPCR stage 3-9 spool, P/N's 9136M89G19, 
9136M89G21, 9136M89G22, and 9136M89G27, installed where the spool 
has 10,500 or more CSN.

CF6-45 and -50 8-Inch Billet 2-Piece spools

    (d) For CF6 HPCR stage 3-9 spool, P/N 9136M89G29, do the 
following:
    (1) If the spool has not already been inspected using one of the 
ASB's or SB's listed in Column A of Table 3; OR a combination of one 
procedure from Column B AND one from Column C; OR a combination of 
one procedure from Column D AND one from Column E, inspect hub and 
bore in accordance with the piece-part level inspection of ASB CF6-
50 S/B 72-A1108, Revision 5, dated October 2, 2002, at the earlier 
of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 6,000 CSN.
    (2) For spools that have not been inspected using ASB CF6-50 S/B 
72-A1131, Revision 4, dated October 2, 2002, or an earlier revision 
of ASB CF6-50 S/B 72-A1131 or SB 72-1131, inspect the web and hub-
to-web transition areas in accordance with the requirements of ASB 
CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, at the 
earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 6,000 CSN.
    (3) For spools that have not been inspected using ASB CF6-50 S/B 
72-A1157, Revision 4, dated October 2, 2002, or an earlier revision 
of ASB 72-A1157, inspect the stage 3-5 dovetail slot bottom in 
accordance with the requirements of ASB CF6-50 S/B 72-A1157, 
Revision 4, dated October 2, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 6,000 CSN.

Spool Disposition

    (4) If inspection findings equal or exceed the reject limits 
established by ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 
2002; or ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002; 
or ASB CF6-50 S/B 72-A1157, Revision 4, dated

[[Page 77661]]

October 2, 2002; replace spool before further flight.

CF6-80A 16-Inch Billet Spools

    (e) For CF6 HPCR stage 3-9 spool, P/N's 9136M89G10 with SN's 
MPOM0054, MPOM7090, MPOM8303, MPOM8304, MPOM9263, MPOM9264, 
MPON0054, MPON0071, MPON0072, MPON1643, MPON4251, or MPON4253, do 
the following:

Initial Inspection

    (1) If the spool has not already been inspected using one of the 
ASB's or SB's listed in Column A of the following Table 7; OR a 
combination of one procedure from Column B AND one from Column C; OR 
a combination of one procedure from Column D AND one from Column E, 
inspect hub and bore in accordance with ASB CF6-80A S/B 72-A0678, 
Revision 5, dated October 2, 2002, and the following compliance 
times:

                                                     Table 7
----------------------------------------------------------------------------------------------------------------
         CF6-80A SB No.                     Procedures (70-32-XX) in standard practices manual GEK9250
----------------------------------------------------------------------------------------------------------------
            Column A                   Column B            Column C            Column D            Column E
----------------------------------------------------------------------------------------------------------------
SB 72-500, Revision 3, dated      70-32-09, Revision  70-32-10, Revision  70-32-13,           70-32-14, TR 70-
 March 19, 1991.                   71, dated October   71, dated October   Temporary           26, dated August
                                   1, 1995.            1, 1995.            Revision (TR), 70-  26, 1996.
                                                                           25, dated August
                                                                           26, 1996.
SB 72-500, Revision 4, dated      70-32-09, Revision  70-32-10, Revision  70-32-13, Revision  70-32-14, Revision
 July 1, 1991.                     72, dated           72, dated           72, dated           72, dated
                                   November 15, 1996.  November 15, 1996.  November 15, 1996.  November 15,
                                                                                               1996.
SB 72-500, Revision 5, dated      70-32-09, Revision  70-32-10, Revision  70-32-13, Revision  70-32-14, Revision
 November 7, 1994.                 74, dated May 1,    74, dated May 1,    73, dated           73, dated
                                   1998.               1998.               November 1, 1997.   November 1, 1997.
SB 72-500, Revision 6, dated      ..................  70-32-10, Revision  70-32-13, Revision  70-32-14, Revision
 December 22, 1995.                                    75, dated           75, dated           75, dated
                                                       December 15, 1998.  December 15, 1998.  December 15,
                                                                                               1998.
SB 72-583, Original, dated        ..................  ..................  70-32-13, TR 70-    70-32-14, TR 70-
 December 20, 1990.                                                        41, dated           42, dated
                                                                           February 10, 1999.  February 10,
                                                                                               1999.
SB 72-583, Revision 1, dated      ..................  ..................  70-32-13, Revision  70-32-14, Revision
 March 18, 1991.                                                           76, dated May 15,   76, dated May 15,
                                                                           1999.               1999.
SB 72-583, Revision 2, dated      ..................  ..................  70-32-17, TR 70-    70-32-18, TR 70-
 July 15, 1991.                                                            39, dated           40, dated
                                                                           December 15, 1998.  December 15,
                                                                                               1998.
SB 72-583, Revision 3, dated      ..................  ..................  70-32-17, Revision  70-32-18, Revision
 July 24, 1991.                                                            76, dated May 15,   76, dated May 15,
                                                                           1999.               1999.
SB 72-583, Revision 4, dated      ..................  ..................  70-32-17, TR 70-    70-32-18, TR 70-
 September 15, 1993.                                                       47, dated October   48, dated October
                                                                           28, 1999.           28, 1999.
SB 72-583, Revision 5, dated
 December 22, 1995.
SB 72-678, Original, dated
 November 6, 1995.
SB 72-678, Revision 1, dated
 July 29, 1996.
ASB 72-A678, Revision 2, dated
 October 28, 1999.
ASB 72-A678, Revision 3, dated
 November 12, 1999.
ASB 72-A0678, Revision 4, dated
 June 6, 2001.
ASB CF6-80A S/B 72-A0678,
 Revision 5, dated October 2,
 2002.
----------------------------------------------------------------------------------------------------------------

    (i) For spools with greater than 3,500 CSN on the effective date 
of this AD, inspect before further flight.
    (ii) For spools with 3,500 or fewer CSN on the effective date of 
this AD, inspect at the first PPE after 1,000 CSN or before 3,500 
CSN, whichever occurs earlier.
    (2) For spools that have not been inspected using ASB CF6-80A S/
B 72-A0691, Revision 5, dated October 2, 2002, or an earlier 
revision of ASB CF6-80A S/B 72-A0691 or SB 72-0691, inspect the web 
and hub-to-web transition areas in accordance with the requirements 
of ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002, at 
the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) Within 4,000 additional CIS accumulated after the effective 
date of this AD.
    (3) For spools that have not been inspected using ASB CF6-80A S/
B 72-A0719, Revision 5, dated October 2, 2002, or an earlier 
revision of ASB CF6-80A S/B 72-A0719, inspect the stage 3--5 
dovetail slot bottom in accordance with the requirements of ASB CF6-
80A S/B 72-A0719, Revision 5, dated October 2, 2002, at the earliest 
of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first HPCR exposure after 1,000 CSN, or
    (iii) The next required inspection to ASB
    CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002.

Repetitive Inspections

    (4) For spools that have already been inspected using one of the 
ASB's or SB's listed in Column A of Table 7; OR a combination of one 
procedure from Column B AND one from Column C; OR a combination of 
one procedure from Column D and one from Column E, reinspect the hub 
and bore in accordance with the requirements of ASB CF6-80A S/B 72-
A0678, Revision 5, dated October 2, 2002; and the dovetail slot 
bottoms in accordance with the requirements of ASB CF6-80A S/B 72-
A0719, Revision 5, dated October 2, 2002, at the earliest of:
    (i) Each PPE with more than 1,000 CSLI and 3,500 CSN, or

[[Page 77662]]

    (ii) From July 29, 2001 through January 27, 2003 before the 
cycle limits of Table 4, or
    (iii) After January 27, 2003, before the cycle limits of Table 
5.

Spool Disposition

    (5) If inspection findings equal or exceed the reject limits 
established by ASB CF6-80A S/B 72-A0678, Revision 5, dated October 
2, 2002; or ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 
2002; or ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 
2002; replace spool before further flight.

Spool Reinstallation Limit

    (6) After the effective date of this AD, do not install any 
engine that has an HPCR stage 3-9 spool P/N 9136M89G10 with serial 
numbers (SN's) MPOM0054, MPOM7090, MPOM8303, MPOM8304, MPOM9263, 
MPOM9264, MPON0054, MPON0071, MPON0072, MPON1643, MPON4251, or 
MPON4253, installed where the spool has 10,500 or more CSN.

CF6-80A 13-Inch Billet Spools

    (f) For all other CF6 HPCR stage 3-9 spools,
    P/N 9136M89G10, with SN's that are not listed in paragraph (e) 
of this AD, and P/N 9136M89G11, do the following:

Initial Inspection

    (1) If the spool has greater than 7,000 CSN on the effective 
date of this AD and has not already been inspected using one of the 
ASB's or SB's listed in Column A of Table 7; OR a combination of one 
procedure from Column B and one from Column C; OR a combination of 
one procedure from Column D and one from Column E, inspect hub and 
bore in accordance with ASB CF6-80A 72-A0678, Revision 5, dated 
October 2, 2002 before further flight.
    (2) If the spool has 7,000 or fewer CSN on the effective date of 
this AD and has not already been inspected using one of the ASB's or 
SB's listed in Column A of Table 7; OR a combination of one 
procedure from Column B and one from Column C; OR a combination of 
one procedure from Column D and one from Column E, inspect hub and 
bore in accordance with ASB CF6-80A S/B 72-A0678, Revision 5, dated 
October 2, 2002, at the earliest of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 5,000 CSN or
    (iii) From July 29, 2001, through January 27, 2003 before 7,000 
CSN, and after January 27, 2003, before 5,000 CSN.
    (3) For spools that have not been inspected using ASB CF6-80A S/
B 72-A0691, Revision 5, dated October 2, 2002, or an earlier 
revision of ASB CF6-80A S/B 72-A0691 or SB 72-0691, inspect the web 
and hub-to-web transition areas in accordance with the requirements 
of ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002, at 
the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) Within 4,000 additional CIS after the effective date of 
this AD.
    (4) For spools that have not been inspected using ASB CF6-80A S/
B 72-A0719, Revision 5, dated October 2, 2002, or an earlier 
revision of ASB CF6-80A S/B 72-A0719, inspect the dovetail slot 
bottom in accordance with the requirements of ASB CF6-80A S/B 72-
A0719, Revision 5, dated October 2, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) Within 4,000 additional CIS after the effective date of 
this AD.

Repetitive Inspection

    (5) For spools installed in CF6-80A1 and CF6-80A3 engines that 
were inspected using one of the ASB's or SB's listed in Column A of 
Table 7; OR a combination of one procedure from Column B and one 
from Column C; OR a combination of one procedure from Column D and 
one from Column E, reinspect hub and bore in accordance with alert 
ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002, at the 
earliest of:
    (i) Each PPE with more than 1,000 CSLI and 5,000 CSN, or
    (ii) Each ESV with more than 2,000 CSLI and 5,000 CSN, or
    (iii) Within 4,000 CSLI and more than 5,000 CSN.
    (6) Spools installed in CF6-80A and CF6-80A2 engines previously 
inspected using one of the ASB's or SB's listed in Column A of Table 
7; OR a combination of one procedure from Column B AND one from 
Column C; OR a combination of one procedure from Column D AND one 
from Column E, reinspect hub and bore in accordance with ASB CF6-80A 
S/B 72-A0678, Revision 5, dated October 2, 2002, at the earliest of:
    (i) Each PPE with more than 1,000 CSLI and 5,000 CSN, or
    (ii) Each ESV with more than 1,500 CSLI and 5,000 CSN, or
    (iii) Within 4,000 CSLI and more than 5,000 CSN.

Spool Disposition

    (7) If inspection findings equal or exceed the reject limits 
established by ASB CF6-80A S/B 72-A0678, Revision 5, dated October 
2, 2002; or ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 
2002; or ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 
2002; replace spool before further flight.

CF6-80A 9 and 10-Inch Billet Spools

    (g) For CF6 HPCR stage 3-9 spools, P/N's 9136M89G20, 9136M89G21, 
9136M89G22 and 9136M89G27, do the following:

Initial Inspection

    (1) If the spool has greater than 7,000 CSN on the effective 
date of this AD and has not already been inspected using one of the 
ASB's or SB's listed in Column A of Table 7; OR a combination of one 
procedure from Column B AND one from Column C; OR a combination of 
one procedure from Column D AND one from Column E, inspect hub and 
bore in accordance with ASB CF6-80A S/B 72-A0678, Revision 5, dated 
October 2, 2002 before further flight.
    (2) If the spool has 7,000 or fewer CSN on the effective date of 
this AD and has not already been inspected using one of the ASB's or 
SB's listed in Column A of Table 7; OR a combination of one 
procedure from Column B AND one from Column C; OR a combination of 
one procedure from Column D AND one from Column E, inspect hub and 
bore in accordance with ASB CF6-80A S/B 72-A0678, Revision 5, dated 
October 2, 2002, at the earliest of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 3,000 CSN or
    (iii) From July 29, 2001, through January 27, 2003, before 7,000 
CSN, and after January 27, 2003, before 5,000 CSN.
    (3) For spools that have not been inspected using ASB CF6-80A S/
B 72-A0691, Revision 5, dated October 2, 2002, or an earlier 
revision of ASB CF6-80A S/B 72-A0691, or SB 72-0691, inspect the web 
and hub-to-web transition areas in accordance with the requirements 
of ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002, at 
the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) Within 4,000 additional CIS after the effective date of 
this AD.
    (4) For spools that have not been inspected using ASB CF6-80A S/
B 72-A0719, Revision 5, dated October 2, 2002, or an earlier 
revision of ASB CF6-80A S/B 72-A0719 inspect the dovetail slot 
bottom in accordance with the requirements of ASB CF6-80A S/B 72-
A0719, Revision 5, dated October 2, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) Within 4,000 additional CIS after the effective date of 
this AD.

Repetitive Inspection

    (5) For spools that have already been inspected using one of the 
ASB's or SB's listed in Column A of Table 7; OR a combination of one 
procedure from Column B AND one from Column C; OR a combination of 
one procedure from Column D AND one from Column E, reinspect hub and 
bore in accordance with ASB CF6-80A S/B 72-A0678, Revision 5, dated 
October 2, 2002, at the earliest of:
    (i) Each PPE with more than 1,000 CSLI and 5,000 CSN, or
    (ii) From July 29, 2001 through January 27, 2003, before the 
cycle limits of Table 6.
    (iii) After January 27, 2003, before the cycle limits of the 
following Table 8:

                                 Table 8
------------------------------------------------------------------------
         CSN at last inspection                Repeat inspection by
------------------------------------------------------------------------
(A) 1,500 or fewer CSN.................  5,000 CSN
(B) 1,501 to 5,000 CSN.................  3,500 CSLI
(C) 5,001 to 5,500 CSN.................  8,500 CSN
(D) 5,501 to 6,501 CSN.................  3,000 CSLI
(E) 6,501 to 7,000 CSN.................  9,500 CSN
(F) 7,001 to 8,000 CSN.................  2,500 CSLI
(G) 8,001 to 8,500 CSN.................  10,500 CSN
(H) 8,501 or more CSN..................  2,000 CSLI
------------------------------------------------------------------------

Spool Disposition

    (6) If inspection findings equal or exceed the reject limits 
established by ASB CF6-80A S/B 72-A0678, Revision 5, dated October 
2, 2002; or ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 
2002; or ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 
2002; replace spool before further flight.

[[Page 77663]]

Spool Reinstallation Limit

    (7) After the effective date of this AD, do not install any 
engine that has an HPCR stage 3-9 spool, P/N's 9136M89G20, 
9136M89G21, 9136M89G22, and 9136M89G27, installed where the spool 
has 10,500 or more CSN.

CF6-80A 8-Inch Billet 2-Piece Spools

    (h) For CF6 HPCR stage 3-9 spool, P/N 9136M89G28, do the 
following:
    (1) If the spool has not already been inspected using one of the 
ASB's or SB's listed in Column A of Table 7; OR a combination of one 
procedure from Column B and one from Column C; OR a combination of 
one procedure from Column D and one from Column E, inspect hub and 
bore in accordance with the piece-part level inspection of ASB CF6-
80A S/B 72-A0678, Revision 5, dated October 2, 2002, at the earlier 
of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 6,000 CSN.
    (2) For spools that have not been inspected using ASB CF6-80A S/
B 72-A0691, Revision 5, dated October 2, 2002, or an earlier 
revision of ASB CF6-80A S/B 72-A0691, or SB 72-0691, inspect the web 
and hub-to-web transition areas in accordance with the requirements 
of ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002, at 
the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 6,000 CSN.
    (3) For spools that have not been inspected using ASB CF6-80A S/
B 72-A0719, Revision 5, dated October 2, 2002, or an earlier 
revision of ASB CF6-80A S/B 72-A0719 inspect the stage 3--5 dovetail 
slot bottom in accordance with the requirements of ASB CF6-80A S/B 
72-A0719, Revision 5, dated October 2, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 6,000 CSN.

Spool Disposition

    (4) If inspection findings equal or exceed the reject limits 
established by ASB CF6-80A S/B 72-A0678, Revision 5, dated October 
2, 2002; or ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 
2002; or ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 
2002; replace spool before further flight.

CF6-80C2 13-Inch Billet Spools

    (i) For CF6 HPCR stage 3-9 spool, P/N's 1781M52P01, 
1854M95P02,1781M52P02, 1854M95P05 and 9380M28P05, do the following:

Initial Inspection

    (1) If the spool has not already been inspected using one of the 
ASB's or SB's listed in Column A of the following Table 9; OR a 
combination of one procedure from Column B and one from Column C; OR 
a combination of one procedure from Column D and one from Column E, 
inspect hub and bore in accordance with ASB CF6-80C2 S/B 72-A0812, 
Revision 4, dated October 2, 2002, and the following compliance 
times:

                                                     Table 9
----------------------------------------------------------------------------------------------------------------
         CF6-80C2 SB No.                    Procedures (70-32-XX) in standard practices manual GEK9250
----------------------------------------------------------------------------------------------------------------
            Column A                   Column B            Column C            Column D            Column E
----------------------------------------------------------------------------------------------------------------
SB 72-418, Revision 2, May 14,    70-32-09, Revision  70-32-10, Revision  70-32-13,           70-32-14, TR 70-
 1991.                             71, dated October   71, dated October   Temporary           26, dated August
                                   1, 1995.            1, 1995.            Revision (TR), 70-  26, 1996.
                                                                           25, dated August
                                                                           26, 1996.
SB 72-418, Revision 3, November   70-32-09, Revision  70-32-10, Revision  70-32-13, Revision  70-32-14, Revision
 7, 1994.                          72, dated           72, dated           72, dated           72, dated
                                   November 15, 1996.  November 15, 1996.  November 15, 1996.  November 15,
                                                                                               1996.
SB 72-418, Revision 4, December   70-32-09, Revision  70-32-10, Revision  70-32-13, Revision  70-32-14, Revision
 22, 1995.                         74, dated May 1,    74, dated May 1,    73, dated           73, dated
                                   1998.               1998.               November 1, 1997.   November 1, 1997.
SB 72-758, Original, dated        ..................  70-32-10, Revision  70-32-13, Revision  70-32-14, Revision
 November 7, 1994.                                     75, dated           75, dated           75, dated
                                                       December 15, 1998.  December 15, 1998.  December 15,
                                                                                               1998.
SB 72-758, Revision 1, dated      ..................  ..................  70-32-13, TR 70-    70-32-14, TR 70-
 December 22, 1995.                                                        41, dated           42, dated
                                                                           February 10, 1999.  February 10,
                                                                                               1999.
SB 72-812, Original, dated        ..................  ..................  70-32-13, Revision  70-32-14, Revision
 November 6, 1995.                                                         76, dated May 15,   76, dated May 15,
                                                                           1999.               1999.
SB 72-812, Revision 1, dated      ..................  ..................  70-32-17, TR70-39,  70-322-18, TR 70-
 january 30, 1998.                                                         dated December      40, dated
                                                                           15, 1998.           December 15,
                                                                                               1998.
ASB 72-A0812, Revision 2, dated   ..................  ..................  70-32-17, Revision  70-32-18, Revision
 October 28, 1999.                                                         76, dated May 15,   76, dated May 15,
                                                                           1999.               1999.
ASB 72-A0812, Revision 3, dated   ..................  ..................  70-32-17, TR 70-    70-32-18, TR 70-
 June 6, 2001.                                                             47, dated October   48, October 28,
                                                                           28, 1999.           1999.
ASB CF6-80C2 S/B 72-A0812,
 Revision 4, dated October 2,
 2002..
----------------------------------------------------------------------------------------------------------------

    (i) For spools with greater than 3,500 CSN on the effective date 
of this AD, inspect before further flight.
    (ii) For spools with 3,500 or fewer CSN on the effective date of 
this AD, inspect at the first PPE after 1,000 CSN or before 3,500 
CSN, whichever occurs earlier.
    (2) For spools that have not been inspected using ASB CF6-80C2 
S/B 72-A0848, Revision 8, dated October 2, 2002, or an earlier 
revision of ASB 72-A0848 or SB 72-0848, inspect the web and hub-to-
web transition areas in accordance with the requirements of ASB CF6-
80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, at the 
earliest of:
    (i) The first PPE after 1000 CSN, or
    (ii) The next required inspection to ASB CF6-80C2 S/B 72-A0812, 
Revision 4, dated October 2, 2002, or
    (iii) From July 29, 2001 through January 27, 2003, before 7,000 
CSN, and after January 27, 2003, before 3,500 CSN.
    (3) For spools that have not been inspected using ASB CF6-80C2 
S/B 72-A0934, Revision 4, dated October 2, 2002, or an earlier 
revision of ASB 72-A0934, inspect the stage 3-5 dovetail slot bottom 
in accordance with the requirements of ASB CF6-80C2 S/B 72-A0934, 
Revision 4, dated October 2, 2002, at the earliest of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first HPCR exposure after 1,000 CSN, or
    (iii) The next required inspection to ASB
    CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002.

Repetitive Inspection

    (4) For spools that have already been inspected using one of the 
ASB's or SB's listed in Column A of Table 9; OR a

[[Page 77664]]

combination of one procedure from Column B AND one from Column C; OR 
a combination of one procedure from Column D AND one from Column E, 
reinspect the hub and bore in accordance with ASB 72-A812, Revision 
4, dated October 2, 2002; the web and hub-to-web transition areas in 
accordance with ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 
2, 2002; and the stage 3-5 dovetail slot bottoms in accordance with 
ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002, at the 
earliest of:
    (i) Each PPE with more than 1,000 CSLI and 3,500 CSN, or
    (ii) From July 29, 2001, through January 27, 2003, before the 
cycle limits of Table 4.
    (iii) After January 27, 2003, before the cycle limits of Table 
5.

Spool Disposition

    (5) If inspection findings equal or exceed the reject limits 
established by ASB CF6-80C2 S/B 72-A0812, Revision 4, dated October 
2, 2002, or ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 
2002, or ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 
2002; replace spool before further flight.

Spool Reinstallation Limit

    (6) After the effective date of this AD, do not install any 
engine that has an HPCR stage 3-9 spool, P/N's 1781M52P01, 
1781M52P02, 1854M95P02, 1854M95P05, and 9380M28P05, installed where 
the spool has 10,500 or more CSN.

CF6-80C2 9 and 10-Inch Billet Spools

    (j) For CF6 HPCR stage 3-9 spool, P/Ns 1333M66G01, 1333M66G03, 
1333M66G07, 1333M66G09, 1781M53G01,1781M53G02, 1781M53G03, 
1781M53G04, 1781M53G06, 1781M53G07, 1781M53G08, 1781M53G09, 
1854M95P01, 1854M95P03, 1854M95P04, 1854M95P06, and 1854M95P07, do 
the following:

Initial Inspection

    (1) If the spool has greater than 7,000 CSN on the effective 
date of this AD and has not already been inspected using one of the 
ASB's or SB's listed in Column A of Table 9; OR a combination of one 
procedure from Column B AND one from Column C; OR a combination of 
one procedure from Column D AND one from Column E, or if the spool 
has not been inspected using ASB CF6-80C2 S/B 72-A0848, Revision 8, 
dated October 2, 2002, or an earlier revision of ASB 72-A0848 or SB 
72-0848, inspect the hub and bore in accordance with ASB CF6-80C2 S/
B 72-A0812, Revision 4, dated October 2, 2002; and the web and hub-
to-web transition areas in accordance with ASB CF6-80C2 S/B 72-
A0848, Revision 8, dated October 2, 2002, before further flight.
    (2) If the spool has 7,000 or fewer CSN on the effective date of 
this AD, and has not already been inspected using one of the ASB's 
or SB's listed in Column A of Table 9; OR a combination of one 
procedure from Column B and one from Column C; OR a combination of 
one procedure from Column D and one from Column E, inspect the hub 
and bore in accordance with ASB CF6-80C2 S/B 72-A0812, Revision 4, 
dated October 2, 2002, at the earliest of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 3,000 CSN, or
    (iii) From July 29, 2001, through January 27, 2003, before 7,000 
CSN, and after January 27, 2003, before 3,500 CSN.
    (3) If the spool has 7,000 or fewer CSN on the effective date of 
this AD, and has not already been inspected using ASB CF6-80C2 S/B 
72-A0848, Revision 8, dated October 2, 2002, or an earlier revision 
of ASB 72-A0848 or SB CF6-80C2 72-0848, inspect the web and the web 
and hub-to-web transition areas in accordance with CF6-80C2 S/B 72-
A0848, Revision 8, dated October 2, 2002, at the earliest of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 3,000 CSN, or
    (iii) From July 29, 2001, through July 28, 2003, before 7,000 
CSN and after July 28, 2003, before 3,500 CSN.
    (4) For spools that have not been inspected using ASB CF6-80C2 
S/B 72-A0934, Revision 4, dated October 2, 2002, or an earlier 
revision of ASB 72-A0934, inspect the stage 3-5 dovetail slot bottom 
in accordance with the requirements of ASB CF6-80C2 S/B 72-A0934, 
Revision 4, dated October 2, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) Within 4,000 additional CIS after the effective date of 
this AD.

Repetitive Inspection

    (5) For spools that have already been inspected using one of the 
ASB's or SB's listed in Column A of Table 9; OR a combination of one 
procedure from Column B and one from Column C; OR a combination of 
one procedure from Column D and one from Column E, reinspect the hub 
and bore in accordance with the requirements of ASB CF6-80C2 S/B 72-
A0812, Revision 4, dated October 2, 2002, and the web and hub-to-web 
transition areas in accordance with ASB CF6-80C2 S/B 72-A0848, 
Revision 8, dated October 2, 2002, at the earlier of:
    (i) Each PPE with more than 1,000 CSLI and 3,500 CSN, or
    (ii) From July 29, 2001, through January 27, 2003, before the 
cycle limits of Table 6, and after January 27, 2003, before the 
cycle limits of Table 5.

Spool Disposition

    (6) If inspection findings equal or exceed the reject limits 
established by ASB CF6-80C2 S/B 72-A0812, Revision 4, dated Revision 
4, dated October 2, 2002, or ASB CF6-80C2 S/B 72-A0848, Revision 8, 
dated October 2, 2002, or ASB CF6-80C2 S/B 72\A0934, Revision 4, 
dated October 2, 2002; replace spool before further flight.

Spool Reinstallation Limit

    (7) After the effective date of this AD, do not install any 
engine that has an HPCR stage 3-9 spool, P/N's 1333M66G01, 
1333M66G03, 1333M66G07, 1333M66G09, 1781M53G01, 1781M53G02, 
1781M53G03, 1781M53G04, 1781M53G06, 1781M53G07, 1781M53G08, 
1781M53G09, 1854M95P01, 1854M95P03, 1854M95P04, 1854M95P06 and 
1854M95P07, installed where the spool has 10,500 or more CSN.

CF6-80C2 8-Inch Billet 2-Piece Spools

    (k) For CF6 HPCR stage 3-9 spool, P/N's 1333M66G10, 1781M53G05, 
1781M53G010, and 1854M95P08, do the following:
    (1) If the spool has not already been inspected using one of the 
ASB's or SB's listed in Column A of Table 9; OR a combination of one 
procedure from Column B and one from Column C; OR a combination of 
one procedure from Column D and one from Column E, inspect hub and 
bore in accordance with the piece-part level inspection of ASB 72-
A0812, Revision 4, dated October 2, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 6,000 CSN.
    (2) For spools that have not been inspected using ASB 72-A0848, 
Revision 8, dated October 2, 2002, or an earlier revision of ASB 72-
A0848, or SB 72-0848, inspect the web and hub-to-web transition 
areas in accordance with the requirements of ASB CF6-80C2 S/B 72-
A0848, Revision 8, dated October 2, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 6,000 CSN.
    (3) For spools that have not been inspected using ASB CF6-80C2 
S/B 72-A0934, Revision 3, dated October 2, 2002, or an earlier 
revision of ASB 72-A0934, inspect the stage 3-5 dovetail slot bottom 
in accordance with the requirements of ASB CF6-80C2 S/B 72-A0934, 
Revision 4, dated October 2, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 6,000 CSN.

Spool Disposition

    (4) If inspection findings equal or exceed the reject limits 
established by ASB CF6-80C2 S/B 72-A0812, Revision 4, dated October 
2, 2002, or ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 
2002, or ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 
2002; replace spool before further flight.

CF6-80E1 9&10-Inch Billet Spools

    (l) For CF6 HPCR stage 3-9 spool, P/N's 1669M22G01, 1669M22G03, 
1782M22G01 and 1782M22G02, do the following:

Initial Inspection

    (1) If the spool has greater than 7,000 CSN and has not already 
been inspected using one of the ASB's listed in Column A of the 
following Table 10; OR a combination of one procedure from Column B 
and one from Column C; OR a combination of one procedure from Column 
D and one from Column E, OR if the spool has not been inspected 
using ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002, 
or an earlier revision of ASB 72-A0126, or SB 72-0126, inspect the 
hub and bore in accordance with ASB CF6-80E1 S/B 72-A0135, Revision 
3, dated October 2, 2002; and the web and hub-to-web transition 
areas in accordance with ASB CF6-80E1 S/B 72-A0126, Revision 5, 
dated October 2, 2002, before further flight.

[[Page 77665]]



                                                    Table 10
----------------------------------------------------------------------------------------------------------------
                                            Procedures (70-32-XX) in standard practices manual GEK9250
    CF6-80E1 SB No.  Column A    -------------------------------------------------------------------------------
                                       Column B            Column C            Column D            Column E
----------------------------------------------------------------------------------------------------------------
ASB 72-A0135, dated August 13,    70-32-09, Revision  70-32-10, Revision  70-32-13,           70-32-14, TR 70-
 1998.                             71, dated October   71, dated October   Temporary           26, dated August
                                   1, 1995.            1, 1995.            Revision (TR), 70-  26, 1996.
                                                                           25, dated August
                                                                           26, 1996.
ASB 72-A0135, Revision 1, dated   70-32-09, Revision  70-32-10, Revision  70-32-13, Revision  70-32-14, Revision
 October 28, 1999.                 71, dated           71, dated           72, dated           71, dated
                                   November 15, 1996.  November 15, 1996.  November 15, 1996.  November 15,
                                                                                               1996.
ASB 72-A0135, Revision 2, dated   70-32-09, Revision  70-32-10, Revision  70-32-13, Revision  70-32-14, Revision
 June 6, 2001.                     74, dated May 1,    74, dated May 1,    73, dated           73, dated
                                   1998.               1998.               November 1, 1997.   November 1, 1997.
ASB CF6-80E1 S/B 72-A0135,        ..................  70-32-10, Revision  70-32-13, Revision  70-32-14, Revision
 Revision 3, dated October 2,                          75, dated           75, dated           75, dated
 2002.                                                 December 15, 1998.  December 15, 1998.  December 15,
                                                                                               1998.
                                                                          70-32-13, TR 70-    70-41, TR 70-42,
                                                                           41, dated           dated February
                                                                           February 10, 1999.  10, 1999.
                                                                          70-31-13, Revision  70-31-14, Revision
                                                                           76, dated May 15,   76, dated May 15,
                                                                           1999.               1999.
                                                                          70-31-17, TR 70-    70-31-18, TR 70-
                                                                           39, dated           40, dated
                                                                           December 15, 1998.  December 15,
                                                                                               1998.
                                                                          70-31-17, Revision  70-31-18, Revision
                                                                           76, dated May 15,   76, dated May 15,
                                                                           1999.               1999.
                                                                          70-31-17 TR 70-47,  70-31-18 TR 70-48,
                                                                           dated October 28,   dated October 28,
                                                                           1999.               1999.
----------------------------------------------------------------------------------------------------------------

    (2) If the spool has 7,000 or fewer CSN and has not already been 
inspected using one of the ASB's listed in Column A of Table 10; OR 
a combination of one procedure from Column B and one from Column C; 
OR a combination of one procedure from Column D and one from Column 
E, OR if the spool has not been inspected using ASB CF6-80E1 S/B 72-
A0126, Revision 5, dated October 2, 2002, or an earlier revision of 
ASB 72-A0126, or SB 72-0126, inspect the hub and bore in accordance 
with ASB CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002; 
and the web and hub-to-web transition areas in accordance with ASB 
CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002, at the 
earliest of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 3,000 CSN, or
    (iii) From July 29, 2001, through January 27, 2003, before 7,000 
CSN, and after January 27, 2003, before 3,500 CSN.
    (3) Spools not previously inspected using ASB CF6-80E1 S/B 72-
A0137, Revision 4, dated October 2, 2002, or an earlier revision of 
ASB 72-0137, or SB 72-0137, inspect stage 3-5 dovetail slot bottoms 
in accordance with the requirements of ASB CF6-80E1 S/B 72-A0137, 
Revision 4, dated October 2, 2002, at the earliest of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first HPCR exposure after 1,000 CSN, or
    (iii) The next required inspection to ASB
    CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002.

Repetitive Inspection

    (4) For spools that have already been inspected using one of the 
ASB's listed in Column A of Table 10; OR a combination of one 
procedure from Column B and one from Column C; OR a combination of 
one procedure from Column D and one from Column E, inspect the hub 
and bore in accordance with the requirements of ASB CF6-80E1 S/B 72-
A0135, Revision 3, dated October 2, 2002, the web and hub-to-web 
transition areas in accordance with ASB CF6-80E1 S/B 72-A0126, 
Revision 5, dated October 2, 2002, and the stage 3-5 dovetail slot 
bottoms in accordance with ASB CF6-80E1 S/B 72-A0137, Revision 4, 
dated October 2, 2002, at the earlier of:
    (i) Each PPE with more than 1,000 CSLI and 3,500 CSN, or
    (ii) From July 29, 2001, through January 27, 2003, before the 
cycle limits of Table 6, and after January 27, 2003, before the 
cycle limits of Table 5.

Spool Disposition

    (5) If inspection findings equal or exceed the reject limits 
established by ASB CF6-80E1 S/B 72-A0135, Revision 3, dated October 
2, 2002; ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 
2002; and ASB CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 
2002; replace spool before further flight.

Spool Reinstallation Limit

    (6) After the effective date of this AD, do not install any 
engine that has an HPCR stage 3-9 spool, P/N's 1669M22G01, 
1669M22G03, 1782M22G01, and 1782M22G02, installed where the spool 
has 10,500 or more CSN.

CF6-80E1 8-Inch Billet 2-Piece Spools

    (m) For CF6 HPCR stage 3-9 spool, P/N 1782M22G04, do the 
following:
    (1) If the spool has not already been inspected using one of the 
ASB's or SB's listed in Column A of the following Table 9; OR a 
combination of one procedure from Column B and one from Column C; OR 
a combination of one procedure from Column D and one from Column E, 
inspect hub and bore in accordance with the piece-part level 
inspection of ASB CF6-80E1 S/B 72-A0135, Revision 3, dated October 
2, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 6,000 CSN.
    (2) For spools that have not been inspected using ASB CF6-80E1 
S/B 72-A0126, Revision 5, dated October 2, 2002, or an earlier 
revision of ASB 72-A0126, or SB 72-0126, inspect the web and hub-to-
web transition areas in accordance with ASB CF6-80E1 S/B 72-A0126, 
Revision 5, dated October 2, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 6,000 CSN.
    (3) For spools that have not been inspected using ASB CF6-80E1 
S/B 72-A0137, Revision 4, dated October 2, 2002, or an earlier 
revision of ASB 72-A0137, or SB 72-0137, inspect the stage 3-5 
dovetail slot bottoms in accordance with ASB CF6-80E1 S/B 72-A0137, 
Revision 4, dated October 2, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 6,000 CSN.

Spool Disposition

    (4) If inspection findings equal or exceed the reject limits 
established by ASB CF6-80E1 S/B 72-A0135, Revision 3, dated October 
2, 2002; ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 
2002; and ASB CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 
2002; replace spool before further flight.

Reporting Requirements

    (n) Within five calendar days of inspection, report the results 
of inspections that equal or exceed the reject criteria to: Engine 
Certification Office, FAA, Engine and Propeller Directorate, 12 New 
England Executive park, Burlington, MA 01803-5299; telephone (781) 
238-7147; fax (781) 238-7199. Reporting requirements have been 
approved by the Office of Management and

[[Page 77666]]

Budget and assigned OMB control number 2120-0056. Be sure to include 
the following information:
    (1) Part Number.
    (2) Serial Number.
    (3) Spool CSN.
    (4) Spool CSLI.
    (5) Date and location where inspection was done.

Definitions

    (o) For the purpose of this AD, the following definitions apply:
    (1) A module level exposure is a separation of the fan module 
from the engine.
    (2) An HPC rotor exposure is a HPC top or bottom case removal.
    (3) A PPE is a disassembly and removal of the stage 3-9 spool 
from the HPCR structure, regardless of any blades, locking lugs, 
bolts or balance weights assembled to the spool.
    (4) An ESV is the introduction of an engine into the shop where 
the separation of a major engine flange will occur after the 
effective date of this AD.
    (5) The following maintenance actions, or any combination, are 
not considered ESV's for requiring repeat inspections:
    (i) Introduction of an engine into a shop solely for removal of 
the compressor top or bottom case for airfoil maintenance or 
variable stator vane bushing replacement.
    (ii) Introduction of an engine into a shop solely for removal or 
replacement of the Stage 1 Fan Disk.
    (iii) Introduction of an engine into a shop solely for 
replacement of the Turbine Rear Frame.
    (iv) Introduction of an engine into a shop solely for 
replacement of the Accessory and/or Transfer Gearboxes.
    (v) Introduction of an engine into a shop solely for replacement 
of the Fan Forward Case.

Alternative Methods of Compliance

    (p) An alternative method of compliance or adjustment of the 
compliance time that provides an acceptable level of safety may be 
used if approved by the Manager, Engine Certification Office (ECO). 
Operators must submit their request through an appropriate FAA 
Principal Maintenance Inspector, who may add comments and then send 
it to the Manager, ECO.

    Note 2: Information concerning the existence of approved 
alternative methods of compliance with this airworthiness directive, 
if any, may be obtained from the ECO.

Special Flight Permits

    (q) Special flight permits may be issued in accordance with 
Sec. Sec.  21.197 and 21.199 of the Federal Aviation Regulations (14 
CFR 21.197 and 21.199) to operate the airplane to a location where 
the requirements of this AD can be done.

Documents That Have Been Incorporated By Reference

    (r) The inspections must be done in accordance with the 
following GE Aircraft Engines alert service bulletins (ASB's):

----------------------------------------------------------------------------------------------------------------
                Document No.                     Pages      Revision                      Date
----------------------------------------------------------------------------------------------------------------
ASB CF6-50 S/B 72-A1108.....................        All            5   October 2, 2002.
 Total pages: 7.
ASB CF6-50 S/B 72-A1131.....................        All            4    Do.
 Total pages: 43.
ASB CF6-50 S/B 72-A1157.....................        All            4    Do.
 Total pages: 38.
ASB CF6-80A S/B 72-A0678....................        All            5    Do.
 Total pages: 7.
ASB CF6-80A S/B 72-A0691....................        All            5    Do.
 Total pages: 43.
ASB CF6-80A S/B 72-A0719....................        All            5    Do.
 Total pages: 38.
ASB CF6-80C2 S/B 72-A0812...................        All            4    Do.
 Total pages: 6.
ASB CF6-80C2 S/B 72-A0848...................        All            8    Do.
 Total pages: 43.
ASB CF6-80C2 S/B 72-A0934...................        All            4    Do.
 Total pages: 38.
ASB CF6-80E1 S/B 72-A0126...................        All            5    Do.
 Total pages: 44.
ASB CF6-80E1 S/B 72-A0135...................        All            3    Do.
 Total pages: 6.
ASB CF6-80E1 S/B 72-A0137...................        All            4    Do.
 Total pages: 38.
----------------------------------------------------------------------------------------------------------------

    This incorporation by reference was approved by the Director of 
the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR 
part 51. Copies may be obtained from General Electric Company via 
Lockheed Martin Technology Services, 10525 Chester Road, Suite C, 
Cincinnati, Ohio 45215, telephone (513) 672-8400, fax (513) 672-
8422. Copies may be inspected at the FAA, New England Region, Office 
of the Regional Counsel, 12 New England Executive Park, Burlington, 
MA; or at the Office of the

Effective Date

    (s) This amendment becomes effective on January 23, 2003.

    Issued in Burlington, Massachusetts, on December 11, 2002.
Francis A. Favara,
Acting Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 02-31754 Filed 12-18-02; 8:45 am]
BILLING CODE 4910-13-U