Federal Register - July 8, 2021
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Source: Federal Register
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Federal Register / Vol. 86, No. 128 / Thursday, July 8, 2021 / Rules and Regulations
Request To Allow Use of Later Revisions of Service Information DAL requested that the FAA add the phrase or later after PW Section PW1000GA72000002A0B5AA
of PW Engine Maintenance Manual EMM, Issue No. 016, dated January 15, 2021, and PW Section PW1000GA72
310000A312AD of PW EMM, Issue No. 016, dated January 11, 2021, referenced in Notes 2 and 3 to paragraph g6 of this AD. DAL stated that if a maintenance technician were troubleshooting Onboard Maintenance Message fault code 7100F0029 or 7100F0030, the maintenance technician would be guided to the latest issue of the publication.
The FAA disagrees to add the phrase or later to the required actions section as requested by DAL. Notes 2 and 3 to paragraph g6 of this AD, which contain references to the sections of the EMM specified by DAL, provide guidance for both determining the N1
Exceedance duration and for performing the BSI. This AD does not mandate the use of specific manual revisions for purposes of compliance with the required actions.
Conclusion The FAA reviewed the relevant data, considered any comments received, and determined that air safety requires adopting the AD as proposed.
Accordingly, the FAA is issuing this AD
to address the unsafe condition on these products. Except for minor editorial changes, and any other changes described previously, this AD is adopted as proposed in the NPRM.
None of the changes will increase the economic burden on any operator.
Related Service Information The FAA reviewed Pratt & Whitney Service Bulletin SB PW1000GA72
00012500A930AD, Issue No. 002, dated October 24, 2019; Pratt & Whitney SB PW1000GA7200007500B
930AD, Issue No. 003, dated October 24, 2019; Pratt & Whitney SB
PW1000GA7300004400A930A
D, Issue No. 004, dated February 23, 2021; and Pratt & Whitney SB
PW1000GA7300002300B930A
D, Issue No. 002, dated February 22, 2021. The FAA also reviewed Section PW1000GA72000002A0B5AA
of Pratt & Whitney EMM, Issue No. 016, dated January 15, 2021; and Section PW1000GA72310000A312AD
of Pratt & Whitney EMM, Issue No. 016, dated January 11, 2021.
Pratt & Whitney SBs PW1000GA
7200012500A930AD, Issue No.
002, dated October 24, 2019, and PW1000GA7200007500B930A
D, Issue No. 003, dated October 24, 2019, describe procedures for performing initial and repetitive BSI of certain LPC R1s. Pratt & Whitney SB
PW1000GA7300004400A930A
D, Issue No. 004, dated February 23, 2021, describes procedures for replacing or modifying the EEC to incorporate EEC FADEC software version V2.11.10.4. Pratt & Whitney SB
PW1000GA7300002300B930A
D, Issue No. 002, dated February 22, 2021, describes procedures for replacing or modifying the EEC to incorporate EEC FADEC software version V9.5.6.7.
Section PW1000GA72000002A
0B5AA of Pratt & Whitney EMM, Issue No. 016, dated January 15, 2021, describes procedures for inspecting the engine for possible engine damage after receiving notification of an N1 or N2
overspeed operation. Section PW1000GA72310000A312AD
of Pratt & Whitney EMM, Issue No. 016, dated January 11, 2021, describes procedures for performing a BSI of the LPC.
Interim Action The FAA considers this AD to be an interim action. If final corrective action is later identified, the FAA might consider additional rulemaking.
Costs of Compliance The FAA estimates that this AD
affects 94 engines installed on airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:
ESTIMATED COSTS
Action
Labor cost
Replace EEC FADEC software
BSI per inspection cycle
2 work-hours $85 per hour = $170
2 work-hours $85 per hour = $170
The FAA estimates the following costs to do any necessary replacements that would be required based on the
Cost per product
Parts cost
results of the inspection. The agency has no way of determining the number of
$0
0
$170
170
Cost on U.S.
operators $15,980
15,980
aircraft that might need this replacement:
lotter on DSK11XQN23PROD with RULES1
ON-CONDITION COSTS
Action
Labor cost
Replace LPC R1
BSI of the LPC R1 if Onboard Maintenance Message fault codes are displayed.
40 work-hours $85 per hour = $3,400
2 work-hours $85 per hour = $170
The FAA has included all known costs in its cost estimate. According to the manufacturer, however, some of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected individuals.
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Authority for This Rulemaking Title 49 of the United States Code specifies the FAAs authority to issue rules on aviation safety. Subtitle I, Section 106, describes the authority of the FAA Administrator. Subtitle VII, Aviation Programs, describes in more
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Parts cost $156,000
0
Cost per product $159,400
170
detail the scope of the Agencys authority.
The FAA is issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701, General requirements. Under that section, Congress charges the FAA
with promoting safe flight of civil aircraft in air commerce by prescribing
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