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Federal Register / Vol. 86, No. 54 / Tuesday, March 23, 2021 / Proposed Rules
have access to it through their normal course of business or by the means identified in ADDRESSES.

Proposed AD Requirements in This NPRM
This proposed AD would require removing the affected HPT cases from service and replacing the HPT case with a part eligible for installation.

Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 8
engines installed on airplanes of U.S.
registry.
The FAA estimates the following costs to comply with this proposed AD:

ESTIMATED COSTS
Action
Labor cost
Remove and replace the HPT case

1 work-hour $85 per hour = $85

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.
Regulatory Findings The FAA determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD 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.
For the reasons discussed above, I
certify this proposed regulation:
1 Is not a significant regulatory action under Executive Order 12866, 2 Would not affect intrastate aviation in Alaska, and 3 Would not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.

VerDate Sep<11>2014

17:08 Mar 22, 2021

Jkt 253001

Parts cost
The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows:
PART 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:

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

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

CFM International, S.A.: Docket No. FAA
20210187; Project Identifier AD2020
01664E.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD by May 7, 2021.
b Affected ADs None.

$217,600

Cost per product $217,685

Cost on U.S.
operators $1,741,480

f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions Before the HPT case exceeds the cycles since new limit in Table 1 in Planning Information, Paragraph 3.A., of CFM SB
LEAP1A7200042101A930AD, Issue 001, dated October 22, 2020, or during the next piece part exposure, whichever occurs first after the effective date of this AD, remove the affected HPT case from service and replace with a part eligible for installation.
h Definitions For the purpose of this AD:
1 A part eligible for installation is an HPT
case, P/N 2668M94G01, that contains a stage 7 port, P/N 2614M30P01, with an S/N that is not listed in Table 1 in Planning Information, Paragraph 3.A., of CFM SB
LEAP1A7200042101A930AD, Issue 001, dated October 22, 2020.
2 Piece-part exposure is when the HPT
case is removed from the engine and fully disassembled.

d Subject Joint Aircraft System Component JASC
Code of America Code 7250, Turbine Section.

i Alternative Methods of Compliance AMOCs 1 The Manager, ECO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14
CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in Related Information.
Information may be emailed to: ANE-ADAMOC@faa.gov.
2 Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/
certificate holding district office.

e Unsafe Condition This AD was prompted by a report of a manufacturing quality escape found during inspection of an HPT case. The FAA is issuing this AD to prevent failure of the HPT
case. The unsafe condition, if not addressed, could result in failure of the HPT case, uncontained rotor release, damage to the engine, and damage to the airplane.

j Related Information 1 For more information about this AD, contact Chris McGuire, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781
2387120; fax: 781 2387199; email:
Chris.McGuire@faa.gov.
2 For service information identified in this AD, contact CFM International, S.A.,
c Applicability This AD applies to CFM International, S.A.
CFM LEAP1A23, LEAP1A24, LEAP
1A24E1, LEAP1A26, LEAP1A26CJ, LEAP
1A26E1, LEAP1A29, LEAP1A29CJ, LEAP
1A30, LEAP1A32, LEAP1A33, LEAP
1A33B2, and LEAP1A35A model turbofan engines, with a high-pressure turbine HPT
case, part number P/N 2668M94G01, that contains a stage 7 port, P/N 2614M30P01, with a port casting serial number S/N listed in Table 1 in Planning Information, Paragraph 3.A., of CFM Service Bulletin SB
LEAP1A7200042101A930AD, Issue 001, dated October 22, 2020.

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