[Federal Register Volume 66, Number 100 (Wednesday, May 23, 2001)]
[Rules and Regulations]
[Pages 28364-28368]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 01-12942]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 99-NE-58-AD; Amendment 39-12238; AD 2001-10-12]
RIN 2120-AA64


Airworthiness Directives; GE Aircraft Engines CJ610 Series 
Turbojet and CF700 Turbofan Engines

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule; request for comments.

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SUMMARY: This amendment supersedes an existing airworthiness directive 
(AD) that is applicable to GE Aircraft Engines (GEAE) CJ610 series 
turbojet and CF700 series turbofan engines that currently requires 
removal of certain unapproved parts before further flight. This 
amendment requires removal of additional unapproved parts. This 
amendment is prompted by the discovery by the FAA of additional 
unapproved parts not listed in the original AD that have been 
introduced into the field and might be installed on the affected 
engines. The actions specified in this AD are intended to prevent the 
use of unapproved parts which could lead to an uncontained

[[Page 28365]]

engine failure and damage to the airplane.

DATES: Effective June 7, 2001.
    Comments for inclusion in the Rules Docket must be received on or 
before July 23, 2001.

ADDRESSES: Submit comments in triplicate to the Federal Aviation 
Administration (FAA), New England Region, Office of the Regional 
Counsel, Attention: Rules Docket No. 99-NE-58-AD, 12 New England 
Executive Park, Burlington, MA 01803-5299. 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.

FOR FURTHER INFORMATION CONTACT: Kevin Donovan, Aerospace Engineer, 
Engine Certification Office, FAA, Engine and Propeller Directorate, 12 
New England Executive Park, Burlington, MA 01803-5299; telephone (781) 
238-7743, fax (238) 238-7199.

SUPPLEMENTARY INFORMATION: On January 5, 2000, the FAA issued AD 2000-
01-09, Amendment 39-11506 (65 FR 1771) to require removal of certain 
unapproved parts before further flight. That amendment was prompted by 
findings that life-limited parts, with inaccurate records, have been 
introduced into the field and might be installed on the affected 
engines. That condition, if not corrected, could lead to an uncontained 
engine failure and damage to the airplane.
    Since the issuance of that AD, the FAA discovered a compressor 
rotor during an audit with suspected military markings. The 
manufacturer confirmed that the marking was an electro-etched Low Cycle 
Fatigue Cycles (LCFC) marking used strictly on military parts. The 
original AD, AD 2000-01-09, did not identify this particular compressor 
rotor or the three additional rotors containing unapproved parts 
discovered at other locations during subsequent audits.

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 Aircraft Engines (GEAE) CJ610 series 
turbojet and CF700 series turbofan engines of the same type design, 
this AD supersedes AD 2000-01-09 to require removal before further 
flight of the additional unapproved parts not listed in the original AD 
that have been introduced into the field and might be installed on the 
affected engines.

Immediate Adoption of This AD

    Since a situation exists that requires the immediate adoption of 
this regulation, it is found that notice and opportunity for prior 
public comment hereon are impracticable, and that good cause exists for 
making this amendment effective in less than 30 days.

Comments Invited

    Although this action is in the form of a final rule that involves 
requirements affecting flight safety and, thus, was not preceded by 
notice and an opportunity for public comment, comments are invited on 
this rule. Interested persons are invited to comment on this 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 under the caption ADDRESSES. All 
communications received on or before the closing date for comments will 
be considered, and this rule may be amended in light of the comments 
received. Factual information that supports the commenter's ideas and 
suggestions is extremely helpful in evaluating the effectiveness of the 
AD action and determining whether additional rulemaking action would be 
needed.
    Comments are specifically invited on the overall regulatory, 
economic, environmental, and energy aspects of the rule that might 
suggest a need to modify the 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 that 
summarizes each FAA-public contact concerned with the substance of this 
AD 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 99-NE-58-AD.'' The postcard will be date stamped and 
returned to the commenter.

Regulatory Impact

    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.
    The FAA has determined that this regulation is an emergency 
regulation that must be issued immediately to correct an unsafe 
condition in aircraft, and is not a ``significant regulatory action'' 
under Executive Order 12866. It has been determined further that this 
action involves an emergency regulation under DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979). If it is determined 
that this emergency regulation otherwise would be significant under DOT 
Regulatory Policies and Procedures, a final regulatory evaluation will 
be prepared and placed in the Rules Docket. A copy of it, if filed, may 
be obtained from 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.

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 Amendment 39-11506 (65 FR 
1771, January 12, 2000), and by adding a new airworthiness directive 
(AD), Amendment 39-12238, to read as follows:

2001-10-12  GE Aircraft Engines (GEAE) Amendment 39-12238. Docket 
99-NE-58-AD. Supersedes AD 2000-01-09, Amendment 39-11506.

Applicability

    This airworthiness directive (AD) is applicable to GEAE CJ610 
series turbojet and CF700 series turbofan engines, with parts listed 
by part number (P/N) and serial number (SN) in Tables I and II, 
installed. These engines are installed on, but not limited to, the 
Dassault-Aviation Fan Jet Falcon 20 series, Sabreliner NA265 series, 
Learjet 20 series, Israel Aircraft Industries Westwind series, Hansa 
Jet, Aero Commander, and Jet Commander.

    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

[[Page 28366]]

owner/operator must request approval for an alternative method of 
compliance in accordance with paragraph (c) 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 prevent the use of unapproved parts, which could lead to an 
uncontained engine failure and damage to the airplane, accomplish 
the following:

Replacement of Unapproved Parts

    (a) Before further flight, remove any part listed by P/N and SN 
in Tables I and II of this AD, and replace it with a serviceable 
part:

                               Table I.--Unapproved Parts Listed in AD 2000-01-09
----------------------------------------------------------------------------------------------------------------
               Part number                             Part name                        Serial number
----------------------------------------------------------------------------------------------------------------
3007T98G01...............................  Shaft, compressor drive.........  HPCTQA11693
3007T98G01...............................  Shaft, compressor drive.........  HPCTQA11929
3007T98G01...............................  Shaft, compressor drive.........  HPCTQA1929
3007T98G01...............................  Shaft, compressor drive.........  HPGTQA9947
3007T98G01...............................  Shaft, compressor drive.........  TQA14300
37D401014P101............................  Torque ring, turbine............  GGM681
37D401014P101............................  Torque ring, turbine............  GGMCBK1977
37D401014P101............................  Torque ring, turbine............  GGMWZA1230
37D401014P101............................  Torque ring, turbine............  GGMWZA2322
37D401014P101............................  Torque ring, turbine............  GGMWZA4665
37D401014P101............................  Torque ring, turbine............  PMB08403P
37D401014P102............................  Torque ring, turbine............  PMB19204
37D401302P101............................  Spacer, stage 2.................  GATI2099WYR
37D401302P101............................  Spacer, stage 2.................  GATWZA09656
37D401302P101............................  Spacer, stage 2.................  GATWZA10002
37D401302P101............................  Spacer, stage 2.................  GATWZA10148
37D401302P101............................  Spacer, stage 2.................  GATWZA5419
37D401303P102............................  Spacer, stage 3.................  GATCBK02192
37D401303P102............................  Spacer, stage 3.................  GATWZA12030
37D401303P102............................  Spacer, stage 3.................  GGMWZA1022
37D401303P104............................  Spacer, stage 3.................  GATWYR5364
37D401304P104............................  Spacer, stage 4.................  GATANWA2378
37D401305P103............................  Spacer, stage 5.................  GATANW9528
37D401305P103............................  Spacer, stage 5.................  GATANWA7441
37D401305P103............................  Spacer, stage 5.................  GATANWA8542
37D401305P103............................  Spacer, stage 5.................  GGMANW3172
37D401306P103............................  Spacer, stage 6.................  GATANW6380
37D401306P103............................  Spacer, stage 6.................  GGMANW2331
37D401306P105............................  Spacer, stage 6.................  GATCDY71386
37D401306P105............................  Spacer, stage 6.................  GATO7040CDY
37D401307P103............................  Spacer, stage 7.................  GAT59653
37D401307P103............................  Spacer, stage 7.................  GATANW7170
37D401307P103............................  Spacer, stage 7.................  GATANWA7134
37D401307P103............................  Spacer, stage 7.................  GGMANW3104
37D401312P101............................  Disc, stage 2...................  GATI0156WZA
37D401312P101............................  Disc, stage 2...................  GATO8253WZA
37D401312P101............................  Disc, stage 2...................  GATWZA3983
37D401312P101............................  Disc, stage 2...................  GATWZA6604
37D401312P101............................  Disc, stage 2...................  GGMCBK620
37D401312P101............................  Disc, stage 2...................  GGMLBA4491
37D401313P101............................  Disc, stage 3...................  GATI3249WYI
37D401313P101............................  Disc, stage 3...................  GATO7644WZA
37D401313P101............................  Disc, stage 3...................  GATWZA6522
37D401313P101............................  Disc, stage 3...................  GATWZA6723
37D401313P101............................  Disc, stage 3...................  GGMLBA2102
37D401314P102............................  Disc, stage 4...................  GAT05572WZA
37D401314P102............................  Disc, stage 4...................  GATO4383WZA
37D401314P102............................  Disc, stage 4...................  GGMWZA6818
37D401315P101............................  Disc, stage 5...................  GAT12406WZA
37D401315P101............................  Disc, stage 5...................  GATWZA4753
37D401315P101............................  Disc, stage 5...................  GATWZA7093
37D401316P101............................  Disc, stage 6...................  GAT10162WZA
37D401316P101............................  Disc, stage 6...................  GATWZA4435
37D401316P101............................  Disc, stage 6...................  GATWZA7208
37D401316P101............................  Disc, stage 6...................  GGMWZA3376
37D401317P101............................  Disc, stage 7...................  GAT10013WZA
37D401317P101............................  Disc, stage 7...................  GAT13322WZA
37D401317P101............................  Disc, stage 7...................  GATI5009WYR
37D401709P101............................  Disc, stage 8...................  GATO3900WZA
37D401709P101............................  Disc, stage 8...................  GATO5381WZA
37D401709P101............................  Disc, stage 8...................  GGMWZA6906
37D401709P101............................  Disc, stage 8...................  GGMWZA6942
37E501428P102............................  Disc and shaft, stage 1.........  GATI2001WZA

[[Page 28367]]

 
37E501428P102............................  Disc and shaft, stage 1.........  GATWZA8639
37E501428P106............................  Disc and shaft, stage 1.........  GATO8474WZA
37E501428P106............................  Disc and shaft, stage 1.........  GGMWZA3231
4010T01P01...............................  Seal labyrinth, stage 8.........  JADCSF334P59
4010T01P01...............................  Seal labyrinth, stage 8.........  JADCSF5222
4010T01P01...............................  Seal labyrinth, stage 8.........  JADCSF5444P21
4010T01P01...............................  Seal labyrinth, stage 8.........  JADMCI3214
4036T24P01...............................  Turbine wheel, stage 2..........  GATWYR14035
4036T24P01...............................  Turbine wheel, stage 2..........  GATWYR14655
5013T79P01...............................  Disc, stage 5...................  GATI1679WZA
5013T82P01...............................  Disc, stage 7...................  GATI7662WYR
5013T88P01...............................  Spacer, stage 4.................  GAT69935
5013T88P01...............................  Spacer, stage 4.................  GATCDY66715
5013T89P01...............................  Spacer, stage 5.................  GAT60180CDY
5013T89P01...............................  Spacer, stage 5.................  GAT60180CDY
5013T90P01...............................  Spacer, stage 7.................  GAT81678CDY
5013T90P01...............................  Spacer, stage 7.................  GATCDY82036
5018T16P01...............................  Disc, stage 4...................  GAT12222WYR
6028T44P01...............................  Turbine wheel, stage 1..........  GAT11900
6028T44P01...............................  Turbine wheel, stage 1..........  GAT13094
6028T44P01...............................  Turbine wheel, stage 1..........  GAT14749
6028T44P01...............................  Turbine wheel, stage 1..........  GAT15160
6028T44P01...............................  Turbine wheel, stage 1..........  GAT15396WYR
6028T44P01...............................  Turbine wheel, stage 1..........  GAT15703
6028T44P01...............................  Turbine wheel, stage 1..........  GAT15821
6028T44P01...............................  Turbine wheel, stage 1..........  GAT15899
6028T44P01...............................  Turbine wheel, stage 1..........  GAT59743
6028T44P01...............................  Turbine wheel, stage 1..........  GAT60190
6028T44P01...............................  Turbine wheel, stage 1..........  GAT60197
6028T44P01...............................  Turbine wheel, stage 1..........  GAT60483
6028T44P01...............................  Turbine wheel, stage 1..........  GAT7321
6028T44P01...............................  Turbine wheel, stage 1..........  GATA8475
6028T44P01...............................  Turbine wheel, stage 1..........  GATA8492
6028T44P01...............................  Turbine wheel, stage 1..........  GATAJ204
6028T44P01...............................  Turbine wheel, stage 1..........  GATB6925
6028T44P01...............................  Turbine wheel, stage 1..........  GATBE998
6028T44P01...............................  Turbine wheel, stage 1..........  GATE2150
6028T44P01...............................  Turbine wheel, stage 1..........  GATE2259
6028T44P01...............................  Turbine wheel, stage 1..........  GATE2291
6028T44P01...............................  Turbine wheel, stage 1..........  GATE2336
6028T44P01...............................  Turbine wheel, stage 1..........  GATF4496
6028T44P01...............................  Turbine wheel, stage 1..........  GATF4507
6028T44P01...............................  Turbine wheel, stage 1..........  GATFE953
6028T44P01...............................  Turbine wheel, stage 1..........  GATG6470
6028T44P01...............................  Turbine wheel, stage 1..........  GATV6541
6028T44P01...............................  Turbine wheel, stage 1..........  GATV6588
6028T44P01...............................  Turbine wheel, stage 1..........  GATW1573
634E583P04...............................  Turbine wheel, stage 1..........  GATWZA4994
634E583P5................................  Turbine wheel, stage 1..........  GAT10650
634E583P5................................  Turbine wheel, stage 1..........  GAT13048
646C596P2................................  Turbine wheel, stage 2..........  GATCBK01912
646C596P2................................  Turbine wheel, stage 2..........  GATWYR12725
646C596P2 *..............................  Turbine wheel, stage 2..........  GATWZA9723
646C594P2 *..............................  Turbine wheel, stage 2..........  GATWZA9723
646C594P1 *..............................  Turbine wheel, stage 2..........  GATWZA9723
841B690P7................................  Assy, Turbine wheel, stage 1....  GAT9383WZA
841B690P7................................  Assy, Turbine wheel, stage 1....  GATMKF07225
841B690P7................................  Assy, Turbine wheel, stage 1....  GATWYR12358
841B690P7................................  Assy, Turbine wheel, stage 1....  GATWYR13457
841B690P7................................  Assy, Turbine wheel, stage 1....  GATWYR13677
841B690P7................................  Assy, Turbine wheel, stage 1....  GATWZA8110
841B690P7................................  Assy, Turbine wheel, stage 1....  GATWZA8263
841B690P7................................  Assy, Turbine wheel, stage 1....  GATWZA9182
841B690P7................................  Assy, Turbine wheel, stage 1....  OJL0145
841B690P7................................  Assy, Turbine wheel, stage 1....  WDBMKF07219
----------------------------------------------------------------------------------------------------------------
* The FAA has determined that up to three Stage 2 Turbine wheels, SN GATWZA9723, may have been distributed with
  three different P/N's. Therefore, while only P/N 646C596P1 is an approved P/N for the CJ610 and CF700 model
  engine, all three part numbers are listed.


[[Page 28368]]


              Table II.--Additional Unapproved Parts Discovered Since Publication of AD 2000-01-09
----------------------------------------------------------------------------------------------------------------
               Part Number                             Part name                         Serial Number
----------------------------------------------------------------------------------------------------------------
37E501428P102............................  1st Stg Disc/Shaft/Spacer........  GAT14210WYR
37E501428P106............................  Disc & Shaft Stg 1 Comp..........  GAT115140WZA
37D401312P101............................  Disc Stg 2 Comp..................  GAT2107WYR
37D401312P101............................  Disc Stg 2 Comp..................  GAT07432WZA
37D401313P101............................  Disc Stg 3 Comp..................  GAT2432WYR
37D401313P101............................  Disc Stg 3 Comp..................  GAT10717WZA
5018T16P01...............................  Disc Stg 4 Comp..................  GAT10058WYR
5018T16P01...............................  Disc Stg 4 Comp..................  GAT05724WZA
37D401315P101............................  Disc Stg 5 Comp..................  GAT16068WYR
37D401316P101............................  Disc Stg 6 Comp..................  GAT15035WYR
37D401317P101............................  Disc Stg 7 Comp..................  GAT6493WYR
5013T82P01...............................  Disc Stg 7 Comp..................  GAT15819WYR
37D401709P101............................  Disc Stg 8 Comp..................  GAT08842WYR
5013T83P01...............................  Disc Stg 8 Comp..................  GAT07464WYR
4010T010P02..............................  Seal Rot Stg 8 Comp..............  JADMSA09181
4010T010P01..............................  Seal Rot Stg 8 Comp..............  APVM0F00180
4010T01P01...............................  Seal Rot Stg 8 Comp..............  APVM0F00192
5004T73P02...............................  Shaft Rear Comp..................  HPCTQA12100
3007T98G01...............................  Shaft Rear Comp..................  HPCTQ1474
37D401303P102............................  Spacer Stg 3 Comp................  GGMWZA1112
5013T88P01...............................  Spacer Stg 4 Comp................  GAT1A402
37D401302P101............................  Spacer Stg 2 Comp................  GATWRY12483
37D401302P103............................  Spacer Stg 2 Comp................  GATE0A00429
37D401303P102............................  Spacer Stg 3 Comp................  GATWZA5858
37D401304P103............................  Spacer Stg 4 Comp................  GATANW10309
37D401304P103............................  Spacer Stg 4 Comp................  GATANWA5510
5013T88P01...............................  Spacer Stg 4 Comp................  GATCDY61557
37D401305P103............................  Spacer Stg 5 Comp................  GATANW11066
37D401306P103............................  Spacer Stg 6 Comp................  GATANW09191
37D401306P105............................  Spacer Stg 6 Comp................  GAT8654CDY
37D401307P103............................  Spacer Stg 7 Comp................  GATANW9286
37D401307P103............................  Spacer Stg 7 Comp................  GATANWA6612
----------------------------------------------------------------------------------------------------------------

Alternate Methods of Compliance

    (b) 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 shall submit their requests 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.

Effective Date of This AD

    (c) This amendment becomes effective on June 7, 2001.

    Issued in Burlington, Massachusetts, on May 16, 2001.
Diane S. Romanosky,
Acting Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 01-12942 Filed 5-22-01; 8:45 am]
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