Federal Register - June 8, 2021
Versione di testo Cosa è?Dateas è un sito indipendente non affiliato a entità governative. La fonte dei documenti PDF che pubblichiamo qui è l'entità governativa indicata in ciascuno di essi. Le versioni in testo sono trascrizioni che realizziamo per facilitare l'accesso e la ricerca di informazioni, ma possono contenere errori o non essere complete.
Source: Federal Register
Federal Register / Vol. 86, No. 108 / Tuesday, June 8, 2021 / Rules and Regulations 100 FCs since the last piece-part opportunity inspection, is damaged, or is the cause for the removal of the engine. Engine removal for the purposes of complying with this AD is not cause for engine removal as stated in the ALS. The FAA added a note to paragraph g1 of this AD to clarify piece-part inspection requirements.
Request To Define Part Eligible for Installation Cathay requested that the FAA define part eligible for installation in this AD.
The FAA agrees and added a definition of a part eligible for installation in this AD.
Request To Clarify Prohibition on Installation of Parts Cathay asked if there is a prohibition on the installation of parts in this AD.
The FAA notes that if a HPT 1st-stage disk or HPT 2nd-stage disk does not pass the inspection required by paragraphs g1 through 6 of this AD, the HPT 1st-stage disk or 2nd-stage disk, as applicable, must be removed from service. Any HPT 1st-stage disk or 2nd-
stage disk that passes the inspection is eligible for installation. As noted in an earlier comment response, the FAA
added the definition of a part eligible for installation in this AD, which includes this clarification.
Support for the AD
An individual commenter expressed support for the AD as written.
30381
the affected HPT 1st-stage disks and HPT 2nd-stage disks on IAE V2522A5, V2524A5, V2525D5, V2527A5, V2527EA5, V2527MA5, V2528D5, V2530A5, and V2533A5 model turbofan engines and specifies procedures for a USI of the HPT 1ststage disk and HPT 2nd-stage disk.
The FAA also reviewed IAE NMSB
No. V2500E5720015, dated December 15, 2020. The NMSB
identifies the affected HPT 1st-stage disks and HPT 2nd-stage disks on IAE
V2531E5 model turbofan engines and specifies procedures for a USI of the HPT 1st-stage disk and HPT 2nd-stage disk.
This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in ADDRESSES.
Conclusion The FAA reviewed the relevant data, considered any comments received, and determined that air safety requires adopting this 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.
Costs of Compliance
Related Service Information Under 1
CFR Part 51
The FAA reviewed IAE NMSB No.
V2500ENG720713, Revision 1, dated January 26, 2021. The NMSB identifies
The FAA estimates that this AD
affects 1,100 engines installed on airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:
ESTIMATED COSTS
Action
Labor cost
USI the HPT 1st-stage disk and HPT 2ndstage disk.
20 work-hours $85 per hour = $1,700
The FAA estimates the following costs to do any necessary replacement 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
$1,700
Cost on U.S.
operators $1,870,000
aircraft that might need this replacement:
ON-CONDITION COSTS
Action
Labor cost
Replace the HPT 1st-stage disk or HPT 2nd-stage disk.
0 work-hours $85 per hour = $0
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.
jbell on DSKJLSW7X2PROD with RULES
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 detail the scope of the Agencys authority.
VerDate Sep<11>2014
15:53 Jun 07, 2021
Jkt 253001
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 regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce.
This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action.
PO 00000
Frm 00007
Fmt 4700
Sfmt 4700
Parts cost $300,000
Cost per product $300,000
Regulatory Findings This AD will not have federalism implications under Executive Order 13132. This AD will 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.
For the reasons discussed above, I
certify that this AD:
1 Is not a significant regulatory action under Executive Order 12866, 2 Will not affect intrastate aviation in Alaska, and
E:FRFM08JNR1.SGM
08JNR1
