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Federal Register / Vol. 86, No. 125 / Friday, July 2, 2021 / Rules and Regulations
35219

ON-CONDITION COSTS
Action
Labor cost
Replace the HPT 1st-stage disk or HPT 2nd-stage disk.

0 work-hours $85 per hour = $0

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.
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.

lotter on DSK11XQN23PROD with RULES1

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, and 2 Will not affect intrastate aviation in Alaska.

VerDate Sep<11>2014

16:05 Jul 01, 2021

Jkt 253001

List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
The Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:

Parts cost $300,000

Cost per product $300,000

1 A high-pressure turbine HPT 1st-stage disk, part number P/N 2A5001, with serial number S/N, PKLBR34908, PKLBR59989, PKLBR83471, PKLBSC9996, PKLBSG0105, PKLBSG9043 or PKLBSH1829, installed; or 2 An HPT 2nd-stage disk, P/N 2A4802, with S/N PKLBR87800, PKLBR88708
PKLBR89452, PKLBSA9907, PKLBSH9246, PKLBSC8066, PKLBSC8077, or PKLBSG2213, installed.
d Subject
PART 39AIRWORTHINESS
DIRECTIVES

Joint Aircraft System Component JASC
Code 7250, Turbine Section.

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

e Unsafe Condition

Authority: 49 U.S.C. 106g, 40113, 44701.
39.13

Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:

20211151 International Aero Engines AG: Amendment 3921626; Docket No.
FAA20210509; Project Identifier AD
202100608E.
a Effective Date This airworthiness directive AD is effective without actual notice on July 19, 2021. Emergency AD 20211151, issued on May 21, 2021, which contained the requirements of this amendment, was effective with actual notice.
b Affected ADs None.
c Applicability This AD applies to International Aero Engines AG IAE V2522A5, V2524A5, V2527A5, V2527EA5, V2527MA5, V2530A5, and V2533A5 model turbofan engines with:

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This AD was prompted by a review of investigative findings from an event involving an uncontained failure of an HPT
1st-stage disk that resulted in high-energy debris penetrating the engine cowling. The FAA is issuing this AD to prevent failure of the HPT. The unsafe condition, if not addressed, could result in uncontained HPT
failure, release of high-energy debris, damage to the engine, damage to the airplane, and loss of the airplane.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions 1 For affected engines with an installed HPT 1st-stage disk listed in Table 1 to paragraph g1 of this AD, within 10 flight cycles after the effective date of this AD, perform an ultrasonic inspection USI of the HPT 1st-stage disk using the Accomplishment Instructions, paragraph 6, of IAE Non-Modification Service Bulletin NMSB V2500ENG720713, Revision 1, dated January 26, 2021 IAE NMSB V2500
ENG720713.

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