[Federal Register Volume 67, Number 113 (Wednesday, June 12, 2002)]
[Proposed Rules]
[Pages 40239-40249]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 02-14700]


 ========================================================================
 Proposed Rules
                                                 Federal Register
 ________________________________________________________________________
 
 This section of the FEDERAL REGISTER contains notices to the public of 
 the proposed issuance of rules and regulations. The purpose of these 
 notices is to give interested persons an opportunity to participate in 
 the rule making prior to the adoption of the final rules.
 
 ========================================================================
 

  Federal Register / Vol. 67, No. 113 / Wednesday, June 12, 2002 / 
Proposed Rules  

[[Page 40239]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 2001-NE-26-AD]
RIN 2120-AA64


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

AGENCY: Federal Aviation Administration, DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: The Federal Aviation Administration (FAA) proposes to 
supersede 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 an initial and repetitive 
ultrasonic and eddy current inspections of certain HPCR stage 3-9 
spools for cracks. This proposal would remove the AD that requires 
special handling of the spools during fluorescent-penetrant inspection, 
and would adjust and combine the initial and repetitive inspection 
requirements, currently listed in two AD's, into one AD for the HPCR 
stage 3-9 spool. This proposal aligns repetitive inspection 
requirements with the more stringent initial inspection requirements 
required 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 
in the proposed AD are intended to prevent cracks which can cause 
separation of the HPCR stage 3-9 spool and possible uncontained engine 
failure.

DATES: Comments must be received by August 12, 2002.

ADDRESSES: Submit comments in triplicate to the Federal Aviation 
Administration (FAA), New England Region, Office of the Regional 
Counsel, Attention: Rules Docket No. 2001-NE-26-AD, 12 New England 
Executive Park, Burlington, MA 01803-5299. Comments may be inspected at 
this location, by appointment, between 8 a.m. and 4:30 p.m., Monday 
through Friday, except Federal holidays. Comments may also be sent via 
the Internet using the following address: ``[email protected]''. 
Comments sent via the Internet must contain the docket number in the 
subject line.
    The service information referenced in the proposed rule 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 FAA, New England Region, Office of the 
Regional Counsel, 12 New England Executive Park, Burlington, MA.

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) 
238-07147; fax (781) 238-7199.

SUPPLEMENTARY INFORMATION:

Comments Invited

    Interested persons are invited to participate in the making of the 
proposed rule by submitting such written data, views, or arguments as 
they may desire. Communications should identify the Rules Docket number 
and be submitted in triplicate to the address specified above. All 
communications received on or before the closing date for comments, 
specified above, will be considered before taking action on the 
proposed rule. The proposals contained in this action may be changed in 
light of the comments received.
    Comments are specifically invited on the overall regulatory, 
economic, environmental, and energy aspects of the proposed rule. All 
comments submitted will be available, both before and after the closing 
date for comments, in the Rules Docket for examination by interested 
persons. A report summarizing each FAA-public contact concerned with 
the substance of this proposal will be filed in the Rules Docket.
    Commenters wishing the FAA to acknowledge receipt of their comments 
submitted in response to this action must submit a self-addressed, 
stamped postcard on which the following statement is made: ``Comments 
to Docket Number 2001-NE-26-AD.'' The postcard will be date stamped and 
returned to the commenter.

Availability of NPRM's

    Any person may obtain a copy of this NPRM by submitting a request 
to the FAA, New England Region, Office of the Regional Counsel, 
Attention: Rules Docket No. 2001-NE-26-AD, 12 New England Executive 
Park, Burlington, MA 01803-5299.

Discussion

    On August 29, 1995, the FAA issued AD 95-18-14, Amendment 39-9361 
(60 FR 46216, September 6, 1995), to require specific handling of the 
HPCR 3-9 spool during fluorescent penetrant inspection whenever that 
inspection is performed on these spools. That action was prompted by a 
report of an uncontained failure of a General Electric Company (GE) 
CF6-50 HPCR stage 3-9 spool. This requirement, adopted at that time by 
that AD, has since been incorporated in General Electric fluorescent 
penetrant inspection (FPI) Standard Practice 70-32-02.
    On October 18, 1999, the FAA issued AD 99-24-15, Amendment 39-11440 
(64 FR 66554, November 29, 1999), to require more stringent ultrasonic 
and eddy current inspection intervals for certain HPCR stage 3-9 
spools, added CF6-80E1 engines to the inspection program, added 
inspection requirements for spools manufactured from 8 inch diameter 
billet, added inspection requirements for stage 3-5 blade slot bottoms, 
and added inspection requirements for web and hub-to-web transition 
areas. Airworthiness Directive 99-24-15 superseded AD 95-23-03, 
Amendment 39-9423 (60 FR 57803, November 21, 1995). Subsequent to that 
action, there was an additional HPCR stage 3-9 spool separation in 
service and a reassessment was made of the adequacy of the existing 
program in place at that time, to prevent a HPCR stage 3-9 spool 
cracking and separation. Based on that assessment, the FAA determined 
there was a need to make changes to AD 99-24-15.

[[Page 40240]]

    On August 10, 2000, the FAA issued AD 2000-16-12, Amendment 39-
11868 (65 FR 50623, August 21, 2000), to require initial ultrasonic and 
eddy current inspections of certain HPCR stage 3-9 spools for cracks at 
a further accelerated rate relative to the requirements of AD 99-24-15. 
AD 2000-16-12 required initial inspection, on a priority basis, of HPCR 
stage 3-9 spools that had higher probability of failure based on 
service life. AD 2000-16-12 did not require repetitive inspection 
requirements. Certain inspection requirements of AD 99-24-15, which are 
still applicable today, are no longer consistent with that recent 
corrective action. Therefore, a comprehensive initial and repetitive 
inspection program is being proposed for the affected 3-9 spools still 
in service. This proposed rule combines the requirements of AD 99-24-15 
and AD 2000-16-12 with the following additional changes:
     Extends the accelerated initial inspection requirements of 
AD 2000-16-12 beyond July 28, 2001,
     Relaxes initial compliance requirement for the CF6-50 and 
CF6-80A 13-inch billet spools to make them consistent with 9 and 10-
inch billet spools,
     Adds 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,
     Replaces engine shop visit inspection threshold limits for 
certain spools with cyclic limits,
     Adds a time limit for slot bottom inspection for 13-inch 
billet spools for CF6-50, -80A engines and for 9-inch and 10-inch 
billet spools for CF6-50, -80A, and -80C engines,
     Adds time limitation for the initial inspection and adds 
repeat inspection intervals for stage 3-5 slot bottom inspection for 
certain spools,
     Adds a time limit for one-time inspection of 8-inch billet 
2-piece spools, and
     Provides for an alternative modular inspection for the 
slot bottoms,
    The action was prompted by a report of an uncontained failure of an 
HPCR 3-9 spool. These conditions, if not corrected, could result in 
separation of the HPCR stage 3-9 spool and a possible uncontained 
engine failure.

Manufacturer's Service Information

    The FAA has reviewed and approved the technical contents of the 
following GE Alert Service Bulletins (ASB's):

ASB GE CF6-50 72-A1108, Revision 4, dated June 6, 2001
ASB GE CF6-50 72-A1131, Revision 3, dated June 6, 2001
ASB GE CF6-50 72-A1157, Revision 3, dated January 31, 2002
ASB GE CF6-80A 72-A0678, Revision 4, dated June 6, 2001
ASB GE CF6-80A 72-A0691, Revision 4, dated June 6, 2001
ASB GE CF6-80A 72-A0719, Revision 4, dated January 31, 2002
ASB GE CF6-80C2 72-A0812, Revision 3, dated June 6, 2001
ASB GE CF6-80C2 72-A0848, Revision 7, dated June 6, 2001
ASB GE CF6-80C2 72-A0934, Revision 3, dated January 31, 2002
ASB GE CF6-80E1 72-A0135, Revision 2, dated June 6, 2001
ASB GE CF6-80E1 72-A0126, Revision 4 , dated June 6, 2001
ASB GE CF6-80E1 72-A0137, Revision 3, dated January 31, 2002

    Those ASB's describe procedures for eddy current and ultrasonic 
inspections of HPCR stage 3-9 spools for cracks.

FAA's Determination of an Unsafe Condition and Proposed Actions

    Since an unsafe condition has been identified that is likely to 
exist or develop on other GE CF6-45, -50, -80A, -80C2, and -80E1 
turbofan engines of this same type design, the proposed AD would 
supersede AD 95-18-14, AD 99-24-15, and AD 2000-16-12 to require 
initial and repetitive ultrasonic and eddy current inspections. The 
actions would be required to be done in accordance with the service 
bulletin described previously.

Interim Actions

    These proposed actions are considered interim actions, and may be 
changed in future rulemaking actions.

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 proposed 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 proposed rule.
    For the reasons discussed above, I certify that this proposed 
regulation (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) if promulgated, 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 copy of the draft 
regulatory evaluation prepared for this action 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, Safety.

The Proposed Amendment

    Accordingly, pursuant to the authority delegated to me by the 
Administrator, the Federal Aviation Administration proposes to amend 
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:

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 40241]]



                                 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,
                                1781M53G01, 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:

CF6-50 16-inch billet spools

    (a) For CF6 HPCR stage 3-9 spool, part numbers (P/N's) 
9136M89G02, 9136M89G06, 9253M85G02, 9273M14G01, 9331M29G01, and for 
P/N 9136M89G08 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              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              MPOJ1801

[[Page 40242]]

 
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 72-
A1108, Revision 4, dated June 6, 2001, and the following compliance 
times:

                                                     Table 3
----------------------------------------------------------------------------------------------------------------
          CF6-50 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, Revision  70-32-13,           70--32-14, TR, 70-
 January 31, 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 72-888, 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 40243]]

 
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 70-42
 December 14, 1990.                                                        41, dated           dated February
                                                                           February 10, 1999.  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.
----------------------------------------------------------------------------------------------------------------

    (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 by 3,500 CSN, whichever occurs earlier.
    (2) For spools that have not been inspected in accordance with 
the requirements of ASB CF6-50 72-A1131, Revision 3, dated June 6, 
2001, or an earlier revision of ASB 72-A1131 or SB 72-1131, inspect 
the web and hub-to-web transition areas in accordance with the 
requirements of ASB 72-A1131, Revision 3, dated June 6, 2001, at the 
first PPE after 1,000 CSN, but not later than 4,000 additional 
cycles in-service (CIS) after the effective date of this AD.
    (3) For spools that have not been inspected in accordance with 
the requirements of ASB CF6-50 72-A1157, Revision 3, dated January 
31, 2002, or an earlier revision of ASB 72-A1157, inspect the stage 
3-5 dovetail slot bottoms in accordance with the requirements of ASB 
72-A1157, Revision 3 dated January 31, 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 ASB72-A1108, Revision 4, 
dated June 6, 2001.

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 72-A1108, 
Revision 4, dated June 6, 2001, and the stage 3-5 dovetail slot 
bottoms in accordance with ASB 72-A1157, Revision 3, dated January 
31, 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 Table 4.

                                 Table 4
------------------------------------------------------------------------
         CSN at last inspection                    Reinspect 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 Table 
5.

                                 Table 5
------------------------------------------------------------------------
         CSN at last inspection                    Reinspect 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
------------------------------------------------------------------------

    (5) If inspection findings equal or exceed the reject limits 
established by ASB 72-A1108, Revision 4, dated June 6, 2001, or ASB 
72-A1131, Revision 3, dated June 6, 2001, or ASB 72-A1157, Revision 
3, dated January 31, 2002; replace spool before further flight.

CF6-50  13-inch billet spools

    (b) For CF6 HPC Rotor Stage 3-9 Spool, P/N's 9136M89G03, 
9136M89G07, 9136M89G09, 9136M89G17, 9136M89G18, 9253M85G01, and 
9136M89G08 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 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 72-A1108, Revision 4, dated June 
6, 2001 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

[[Page 40244]]

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 
72-A1108, Revision 4, dated June 6, 2001, by 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 in accordance with 
the requirements of ASB 72-A1131, Revision 3, dated June 6, 2001, or 
an earlier revision of ASB 72-A1131, or SB 72-1131, inspect the web 
and hub-to-web transition areas in accordance with the requirements 
of ASB 72-A1131, Revision 3, dated June 6, 2001, by 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 in accordance with 
the requirements of ASB 72-A1157, Revision 3, dated January 31, 
2002, or an earlier revision of ASB 72-A1157, inspect the stage 3-5 
dovetail slot bottoms in accordance with the requirements of ASB 72-
A1157, Revision 3, dated January 31, 2002, by 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 72-A1108, 
Revision 4, dated June 6, 2001, 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.
    (6) If inspection findings equal or exceed the reject limits 
established by ASB 72-A1108, Revision 4, dated June 6, 2001; or ASB 
72-A1131, Revision 3, dated June 6, 2001; or ASB 72-A1157, Revision 
3, dated January 31, 2002; replace spool before further flight.

CF6-50  9&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 72-A1108, Revision 4, dated 
June 6, 2001 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 72-A1108, Revision 4, dated 
June 6, 2001, 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 in accordance with 
the requirements of ASB 72-A1131, Revision 3, dated June 6, 2001, or 
an earlier revision of ASB 72-A1131, or SB 72-1131, inspect the web 
and hub-to-web transition areas in accordance with the requirements 
of ASB 72-A1131, Revision 3, dated June 6, 2001, 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 in accordance with 
the requirements of ASB 72-A1157, Revision 3, dated January 31, 
2002, or an earlier revision of ASB 72-A1157, inspect the stage 3-5 
dovetail slot bottom in accordance with the requirements of ASB 72-
A1157, Revision 3, dated January 31, 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 72-A1108, 
Revision 4, dated June 6, 2001, 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.
    (6) If inspection findings equal or exceed the reject limits 
established by ASB 72-A1108, Revision 4, dated June 6, 2001; or ASB 
72-A1131, Revision 3, dated June 6, 2001; or ASB 72-A1157, Revision 
3, dated January 31, 2002; replace spool before further flight.
    (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.

CF6-508-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 ASB CF6-50 72-A1108, Revision 4, dated June 
6, 2001, 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 in accordance with 
the requirements of ASB 72-A1131, Revision 3, dated June 6, 2001, or 
an earlier revision of ASB 72-A1131, or SB 72-1131, inspect the web 
and hub-to-web transition areas in accordance with the requirements 
of ASB 72-A1131, Revision 3, dated June 6, 2001, 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 in accordance with 
the requirements of ASB 72-A1157, Revision 3, dated January 31, 
2002, or an earlier revision of ASB 72-A1157, inspect the stage 3-5 
dovetail slot bottom in accordance with the requirements of ASB 72-
A1157, Revision 3, dated January 31, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 6,000 CSN.
    (4) If inspection findings equal or exceed the reject limits 
established by ASB 72-A1108, Revision 4, dated June 6, 2001; or ASB 
72-A1131, Revision 3, dated June 6, 2001; or ASB 72-A1157, Revision 
3, dated January 31, 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 72 A0678, Revision 4, 
dated June 6, 2001, and the following compliance times:

[[Page 40245]]



                                                                         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 71, dated   70-32-10, Revision 71, dated   70-32-13, Temporary Revision   70-32-14, TR 70-26, dated
 March 19, 1991                 October 1, 1995                October 1, 1995                (TR), 70-25, dated August      August 26, 1996
                                                                                              26, 1996
SB 72-500, Revision 4, dated   70-32-09, Revision 72, dated   70-32-10, Revision 72, dated   70-32-13, Revision 72, dated   70-32-14, Revision 72, dated
 July 1, 1991                   November 15, 1996              November 15, 1996              November 15, 1996              November 15, 1996
SB 72-500, Revision 5, dated   70-32-09, Revision 74, dated   70-32-10, Revision 74, dated   70-32-13, Revision 73, dated   70-32-14, Revision 73, dated
 November 7, 1994               May 1, 1998                    May 1, 1998                    November 1, 1997               November 1, 1997
SB 72-500, Revision 6, dated   .............................  70-32-10, Revision 75, dated   70-32-13, Revision 75, dated   70-32-14, Revision 75, dated
 December 22, 1995                                             December 15, 1998              December 15, 1998              December 15, 1998
SB 72-583, Original, dated     .............................  .............................  70-32-13, TR 70-41, dated      70-32-14, TR 70-42, dated
 December 20, 1990                                                                            February 10, 1999              February 10, 1999
SB 72-583, Revision 1, dated   .............................  .............................  70-32-13, Revision 76, dated   70-32-14, Revision 76, dated
 March 18, 1991                                                                               May 15, 1999                   May 15, 1999
SB 72-583, Revision 2, dated   .............................  .............................  70-32-17, TR 70-39, dated      70-32-18, TR 70-40, dated
 July 15, 1991                                                                                December 15, 1998              December 15, 1998
SB 72-583, Revision 3, dated   .............................  .............................  70-32-17, Revision 76, dated   70-32-18, Revision 76, dated
 July 24, 1991                                                                                May 15, 1999                   May 15, 1999
SB 72-583, Revision 4, dated   .............................  .............................  70-32-17, TR 70-47, dated      70-32-18, TR 70-48, dated
 September 15, 1993                                                                           October 28, 1999               October 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
--------------------------------------------------------------------------------------------------------------------------------------------------------

    (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 within 3,500 
CSN, whichever occurs earlier.
    (2) For spools that have not been inspected in accordance with 
the requirements of ASB 72-A0691, Revision 4, dated June 6, 2001, or 
an earlier revision of ASB 72-A0691, or SB 72-0691, inspect the web 
and hub-to-web transition areas in accordance with the requirements 
of ASB 72-A0691, Revision 4, dated June 6, 2001, 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 in accordance with 
the requirements of ASB 72-A0719, Revision 4, dated January 31, 
2002, or an earlier revision of ASB 72-A0719, inspect thestage 3-5 
dovetail slot bottom in accordance with the requirements of ASB 72-
A0719, Revision 4, dated January 31, 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 72-A0678, Revision 4, 
dated June 6, 2001.

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 72-A0678, 
Revision 4, dated June 6, 2001; and the dovetail slot bottoms in 
accordance with the requirements of ASB 72-A0719, Revision 4, dated 
January 31, 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, or
    (iii) After January 27, 2003, before the cycle limits of Table 
5.
    (5) If inspection findings equal or exceed the reject limits 
established by ASB 72-A0678, Revision 4, dated June 6, 2001; or ASB 
72-A0691, Revision 4, dated June 6, 2001; or ASB A0719, Revision 4, 
dated January 31, 2002; replace spool before further flight.
    (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 CF6-50 72-A0678, Revision 4, dated June 
6, 2001 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

[[Page 40246]]

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 CF6-50 72-A0678, Revision 4, dated June 
6, 2001, 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 in accordance with 
the requirements of ASB 72-A0691, Revision 4, dated June 6, 2001, or 
an earlier revision of ASB 72-A0691, or SB 72-0691, inspect the web 
and hub-to-web transition areas in accordance with the requirements 
of ASB 72-A0691, Revision 4, dated June 6, 2001, 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 in accordance with 
the requirements of ASB 72-A0719, Revision 4, dated January 31, 
2002, or an earlier revision of ASB 72-A0719 inspect the dovetail 
slot bottom in accordance with the requirements of ASB 72-A0719, 
Revision 4, dated January 31, 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) 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, inspect hub and bore in accordance with alert ASB 
CF6-50 72-A0678, Revision 4, dated June 6, 2001, 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, inspect hub and bore in accordance with ASB CF6-50 
72-A0678, Revision 4, dated June 6, 2001, 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.
    (7) If inspection findings equal or exceed the reject limits 
established by ASB 72-A0678, Revision 4, dated June 6, 2001; or ASB 
72-A0691, Revision 4, dated June 6, 2001; or ASB A0719, Revision 4, 
dated January 31, 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 CF6-50 72-A0678, Revision 4, dated June 
6, 2001 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 CF6-50 72-A0678, Revision 4, dated June 
6, 2001, 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 in accordance with 
the requirements of ASB 72-A0691, Revision 4, dated June 6, 2001, or 
an earlier revision of ASB 72-A0691, or SB 72-0691, inspect the web 
and hub-to-web transition areas in accordance with the requirements 
of ASB 72-A0691, Revision 4, dated June 6, 2001, 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 in accordance with 
the requirements of ASB 72-A0719, Revision 4, dated January 31, 
2002, or an earlier revision of ASB 72-A0719 inspect the dovetail 
slot bottom in accordance with the requirements of ASB 72-A0719, 
Revision 4, dated January 31, 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, inspect hub and 
bore in accordance with ASB CF6-50 72-A0678, Revision 4, dated June 
6, 2001, 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                    Reinspect 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
------------------------------------------------------------------------

    (6) If inspection findings equal or exceed the reject limits 
established by ASB 72-A0678, Revision 4, dated June 6, 2001; or ASB 
72-A0691, Revision 4, dated June 6, 2001; or ASB A0719, Revision 4, 
dated January 31, 2002; replace spool before further flight.
    (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 ASB 72-A0678, Revision 4, dated June 6, 
2001, 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 in accordance with 
the requirements of ASB 72-A0691, Revision 4, dated June 6, 2001, or 
an earlier revision of ASB 72-A0691, or SB 72-0691, inspect the web 
and hub-to-web transition areas in accordance with the requirements 
of ASB 72-A0691, Revision 4, dated June 6, 2001, 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 in accordance with 
the requirements of ASB 72-A0719, Revision 4, dated January 31, 
2002, or an earlier revision of ASB 72-A0719 inspect the stage 3-5 
dovetail slot bottom in accordance with the requirements of ASB 72-
A0719, Revision 4, dated January 31, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 6,000 CSN.
    (4) If inspection findings equal or exceed the reject limits 
established by ASB 72-A0678, Revision 4, dated June 6, 2001; or ASB 
72-A0691, Revision 4, dated June 6, 2001; or ASB 72-A0719, Revision 
4, dated January 31, 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, 
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

[[Page 40247]]

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 72-A0812, Revision 3, dated June 6, 
2001, 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     70-32-09, Revision 71, dated   70-32-10, Revision 71, dated   70-32-13, Temporary Revision   70-32-14, TR 70-26, dated
 14, 1991                       October 1, 1995                October 1, 1995                (TR), 70-25, dated August      August 26, 1996
                                                                                              26, 1996
SB 72-418, Revision 3,         70-32-09, Revision 72, dated   70-32-10, Revision 72, dated   70-32-13, Revision 72, dated   70-32-14, Revision 72, dated
 November 7, 1994               November 15, 1996              November 15, 1996              November 15, 1996              November 15, 1996
SB 72-418, Revision 4,         70-32-09, Revision 74, dated   70-32-10, Revision 74, dated   70-32-13, Revision 73, dated   70-32-14, Revision 73, dated
 December 22, 1995              May 1, 1998                    May 1, 1998                    November 1, 1997               November 1, 1997
SB 72-758, Original, dated     .............................  70-32-10, Revision 75, dated   70-32-13, Revision 75, dated   70-32-14, Revision 75, dated
 November 7, 1994                                              December 15, 1998              December 15, 1998              December 15, 1998
SB 72-758, Revision 1, dated   .............................  .............................  70-32-13, TR 70-41, dated      70-32-14, TR 70-42, dated
 December 22, 1995                                                                            February 10, 1999              February 10, 1999
SB 72-812, Original, dated     .............................  .............................  70-32-13, Revision 76, dated   70-32-14, Revision 76, dated
 November 6, 1995                                                                             May 15, 1999                   May 15, 1999
SB 72-812, Revision 1, dated   .............................  .............................  70-32-17, TR 70-39, dated      70-32-18, TR 70-40, dated
 January 30, 1998                                                                             December 15, 1998              December 15, 1998
ASB 72-A0812, Revision 2,      .............................  .............................  70-32-17, Revision 76, dated   70-32-18, Revision 76, dated
 dated October 28, 1999                                                                       May 15, 1999                   May 15, 1999
ASB 72-A0812, Revision 3,      .............................  .............................  70-32-17, TR 70-47, dated      70-32-18, TR 70-48, dated
 dated June 6, 2001                                                                           October 28, 1999               October 28, 1999
--------------------------------------------------------------------------------------------------------------------------------------------------------

    (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 in accordance with 
the requirements of ASB 72-A0848, Revision 7, dated June 6, 2001, 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 72-A0848, Revision 7, dated June 6, 2001, at the earliest of:
    (i) The first PPE after 1000 CSN, or
    (ii) The next required inspection to ASB 72-A0812, Revision 3, 
dated June 6, 2001, 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 in accordance with 
the requirements of ASB 72-A0934, Revision 3, dated January 31, 
2002, or an earlier revision of ASB 72-A0934, inspect the stage 3-5 
dovetail slot bottom in accordance with the requirements of ASB 72-
A0934, Revision 3, dated January 31, 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 72-A0812, Revision 3, 
dated June 6, 2001

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 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 72-A812, Revision 3, dated June 6, 
2001, the web and hub-to-web transition areas in accordance with ASB 
72-A0848, Revision 7, dated June 6, 2001, and the stage 3-5 dovetail 
slot bottoms in accordance with ASB 72-A0934 Revision 3, dated 
January 31, 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.
    (5) If inspection findings equal or exceed the reject limits 
established by ASB 72-A0812, Revision 3, dated June 6, 2001, or ASB 
72-A0848, Revision 7, dated June 6, 2001, or ASB 72-A0934, Revision 
3, dated January 31, 2002; replace spool before further flight.
    (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, 
1854M95P02, 1854M95P05 and 9380M28P05, installed where the spool has 
10,500 or more CSN.

CF6-80C2  9&10-inch billet spools

    (j) For CF6 HPCR stage 3-9 spool, P/Ns 1333M66G01, 1333M66G03, 
1333M66G07, 1333M66G09, 1781M53G01, 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, and if the spool 
has not been inspected in accordance with ASB 72-A0848, Revision 7, 
dated June 6, 2001, or an earlier revision of ASB 72-A0848, or SB 
72-0848, inspect the hub and bore in accordance with ASB CF6-50 72-
A0812, Revision 3, dated June 6, 2001; and the web and hub-to-web 
transition areas in accordance with ASB 72-A0848, Revision 7, dated 
June 6, 2001, 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, and if the spool 
has not been inspected in accordance with ASB 72-A0848, Revision 7, 
dated June 6, 2001, or an earlier revision of ASB 72-A0848, or SB 
72-0848, inspect the hub and bore in accordance with ASB CF6-50 72-
A0812, Revision 3, dated June 6, 2001; and the web and hub-to-web 
transition areas in accordance with ASB 72-A0848, Revision 7, dated 
June 6, 2001, 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 in accordance with 
the requirements of ASB 72-A0934, Revision 3, dated January 31,

[[Page 40248]]

2002, or an earlier revision of ASB 72-A0934, inspect the stage 3-5 
dovetail slot bottom in accordance with the requirements of ASB 72-
A0934, Revision 3, dated January 31, 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

    (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 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 72-A0812, 
Revision 3, dated June 6, 2001, and the web and hub-to-web 
transition areas in accordance with ASB 72-A0848, Revision 7, dated 
June 6, 2001, 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.
    (5) If inspection findings equal or exceed the reject limits 
established by ASB 72-A0812, Revision 3, dated June 6, 2001, or ASB 
72-A0848, Revision 7, dated June 6, 2001, or ASB 72-A0934, Revision 
3, dated January 31, 2002; replace spool before further flight.
    (6) 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, 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 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 ASB 72-A0812, Revision 3, dated June 6, 
2001, 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 in accordance with 
the requirements of ASB 72-A0848, Revision 7, dated June 6, 2001, 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 72-A0848, Revision 7, dated June 6, 2001, 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 in accordance with 
the requirements of ASB 72-A0934, Revision 3, dated January 31, 
2002, or an earlier revision of ASB 72-A0934, inspect the stage 3-5 
dovetail slot bottom in accordance with the requirements of ASB 72-
A0934, Revision 3, dated January 31, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 6,000 CSN.
    (4) If inspection findings equal or exceed the reject limits 
established by ASB 72-A0812, Revision 3, dated June 6, 2001, or ASB 
72-A0848, Revision 7, dated June 6, 2001, or ASB 72-A0934, Revision 
3, dated January 31, 2002; replace spool before further flight.

CF6-80E1  9&10-inch billet spools

    (1) 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 AND 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, and if the spool has not been 
inspected in accordance with ASB 72-A0126, Revision 5, dated June 6, 
2001, or an earlier revision of ASB 72-A0126, or SB 72-0126, inspect 
the hub and bore in accordance with ASB CF6-50 72-A0135, Revision 2, 
dated June 6, 2001; and the web and hub-to-web transition areas in 
accordance with ASB 72-A0126, Revision 5, dated June 6, 2001, before 
further flight.

                                                                        Table 10
--------------------------------------------------------------------------------------------------------------------------------------------------------
       CF6-80E1 SB No.                                         Procedures (70-32-XX) in standard practices manual GEK9250
--------------------------------------------------------------------------------------------------------------------------------------------------------
           Column A                       Column B                       Column C                       Column D                      Column E
--------------------------------------------------------------------------------------------------------------------------------------------------------
ASB 72-A0135, dated August     70-32-09, Revision 71, dated   70-32-10, Revision 71, dated   70-32-13, Temporary Revision   70-32-14, TR 70-26, dated
 13, 1998                       October 1, 1995                October 1, 1995                (TR), 70-25, dated August      August 26, 1996
                                                                                              26, 1996
ASB 72-A0135, Revision 1,      70-32-09, Revision 72, dated   70-32-10, Revision 72, dated   70-32-13, Revision 72, dated   70-32-14, Revision 72, dated
 dated October 28, 1999         November 15, 1996              November 15, 1996              November 15, 1996              November 15, 1996
ASB 72-A0135, Revision 2,      70-32-09, Revision 74, dated   70-32-10, Revision 74, dated   70-32-13, Revision 73, dated   70-32-14, Revision 73, dated
 dated June 6, 2001             May 1, 1998                    May 1, 1998                    November 1, 1997               November 1, 1997
                               .............................  70-32-10, Revision 75, dated   70-32-13, Revision 75, dated   70-32-14, Revision 75, dated
                                                               December 15, 1998              December 15, 1998              December 15, 1998
                               .............................  .............................  70-32-13, TR 70-41, dated      70-32-14, TR 70-42, dated
                                                                                              February 10, 1999              February 10, 1999
                               .............................  .............................  70-32-13, Revision 76, dated   70-32-14, Revision 76, dated
                                                                                              May 15, 1999                   May 15, 1999
                               .............................  .............................  70-32-17, TR 70-39, dated      70-32-18, TR 70-40, dated
                                                                                              December 15, 1998              December 15, 1998
                               .............................  .............................  70-32-17, Revision 76, dated   70-32-18, Revision 76, dated
                                                                                              May 15, 1999                   May 15, 1999
                               .............................  .............................  70-32-17, TR 70-47, dated      70-32-18, TR 70-48, dated
                                                                                              October 28, 1999               October 28, 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, and if the spool has not been inspected in accordance with ASB 
72-A0126, Revision 5, dated June 6, 2001, or an earlier revision of 
ASB 72-A0126, or SB 72-0126, inspect the hub and bore in accordance 
with ASB CF6-50 72-A0135, Revision 2, dated June 6, 2001; and the 
web and hub-to-web transition areas in

[[Page 40249]]

accordance with ASB 72-A0126, Revision 5, dated June 6, 2001, 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 in accordance with the 
requirements of ASB 72-A0137, Revision 3, dated January 31, 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 72-
A0137, Revision 3, dated January 31, 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 72-A0135, Revision 2, 
dated June 6, 2001.

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 72-A0135, 
Revision 2, dated June 6, 2001, the web and hub-to-web transition 
areas in accordance with ASB 72-A0126, Revision 5, dated June 6, 
2001, and the stage 3-5 dovetail slot bottoms in accordance with ASB 
72-A0137, Revision 3, dated January 31, 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.
    (5) If inspection findings equal or exceed the reject limits 
established by ASB 72-A0135, Revision 2, dated June 6, 2001; ASB 72-
A0126, Revision 5, dated June 6, 2001; and ASB 72-A0137, Revision 3, 
dated January 31, 2002; replace spool before further flight.
    (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 ASB 72-A0135, Revision 2, 
dated June 6, 2001, 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 in accordance with 
the requirements of ASB 72-A0126, Revision 5, dated June 6, 2001, 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 72-A0126, 
Revision 5, dated June 6, 2001, 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 in accordance with 
the requirements of ASB 72-A0137, Revision 3, dated January 31, 
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 72-A0137, 
Revision 3, dated January 31, 2002, at the earlier of:
    (i) The first PPE after 1,000 CSN, or
    (ii) The first ESV after 6,000 CSN.
    (4) If inspection findings equal or exceed the reject limits 
established by ASB 72-A0135, Revision 2, dated June 6, 2001; ASB 72-
A0126, Revision 5, dated June 6, 2001; and ASB 72-A0137, Revision 3, 
dated January 31, 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. Reporting requirements have been approved by the Office of 
Management and 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.
    (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 
Secs. 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.

    Issued in Burlington, Massachusetts, on June 5, 2002.
Francis A. Favara,
Acting Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 02-14700 Filed 6-11-02; 8:45 am]
BILLING CODE 4910-13-P