Airworthiness Directives; CFM International, S.A. Engines, 37111-37113 [2024-09564]

Download as PDF Federal Register / Vol. 89, No. 88 / Monday, May 6, 2024 / Rules and Regulations 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: 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. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive: ■ 2024–08–06 Rolls-Royce Deutschland Ltd & Co KG: Amendment 39–22739; Docket No. FAA–2024–0036; Project Identifier MCAI–2023–00731–E. (a) Effective Date This airworthiness directive (AD) is effective June 10, 2024. (b) Affected ADs None. (c) Applicability This AD applies to Rolls-Royce Deutschland Ltd & Co KG Model Trent 1000– A, Trent 1000–A2, Trent 1000–AE, Trent 1000–AE2, Trent 1000–C, Trent 1000–C2, Trent 1000–CE, Trent 1000–CE2, Trent 1000– D, Trent 1000–D2, Trent 1000–E, Trent 1000– E2, Trent 1000–G, Trent 1000–G2, Trent 1000–H, Trent 1000–H2, Trent 1000–J2, Trent 1000–K2, and Trent 1000–L2 engines. (d) Subject Joint Aircraft System Component (JASC) Code 7300, Engine Fuel and Control. (e) Unsafe Condition This AD was prompted by reports of wear in the combining spill valve (CSV) assembly of certain hydro-mechanical units (HMUs). The FAA is issuing this AD to prevent thrust reduction. The unsafe condition, if not addressed, could result in reduced control of the airplane. ddrumheller on DSK120RN23PROD with RULES1 (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions Except as specified in paragraph (h) of this AD: Perform all required actions within the compliance times specified in, and in accordance with, European Union Aviation Safety Agency (EASA) AD 2023–0113, dated June 1, 2023 (EASA AD 2023–0113). (h) Exceptions to EASA AD 2023–0113 (1) Where EASA AD 2023–0113 refers to its effective date, this AD requires using the effective date of this AD. VerDate Sep<11>2014 16:54 May 03, 2024 Jkt 262001 (2) Where Table 1 of EASA AD 2023–0113 specifies ‘‘15 June 2023’’, replace that text with ‘‘As of the effective date of this AD.’’ (3) Where Table 1 of EASA AD 2023–0113 specifies ‘‘01 January 2025’’, replace that text with ‘‘Within 4 months after the effective date of this AD or January 1, 2025, whichever occurs later.’’ (4) Where the service information referenced in EASA AD 2023–0013 specifies to discard certain parts, this AD requires those parts to be removed from service. (5) This AD does not adopt the Remarks paragraph of EASA AD 2023–0113. (i) Definitions For the purposes of this AD, the ‘‘implementation date’’ is defined as the date that the applicable engine flight hour limit takes effect. (j) Alternative Methods of Compliance (AMOCs) (1) The Manager, AIR–520 Continued Operational Safety 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 AIR–520 Continued Operational Safety Branch, send it to the attention of the person identified in paragraph (k) of this AD and email to: ANEAD-AMOC@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. (k) Additional Information For more information about this AD, contact Sungmo Cho, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (781) 238–7241; email: sungmo.d.cho@faa.gov. (l) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) European Union Aviation Safety Agency (EASA) AD 2023–0113, dated June 1, 2023. (ii) [Reserved] (3) For EASA AD 2023–0113, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; phone: +49 221 8999 000; email: ADs@easa.europa.eu; website: easa.europa.eu. You may find this material on the EASA website at ad.easa.europa.eu. (4) You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call (817) 222–5110. (5) You may view this material at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, PO 00000 Frm 00051 Fmt 4700 Sfmt 4700 37111 visit www.archives.gov/federal-register/cfr/ ibr-locationsoremailfr.inspection@nara.gov. Issued on April 17, 2024. Victor Wicklund, Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2024–09555 Filed 5–3–24; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2024–0030; Project Identifier AD–2023–01066–E; Amendment 39–22722; AD 2024–07–02] RIN 2120–AA64 Airworthiness Directives; CFM International, S.A. Engines Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: The FAA is adopting a new airworthiness directive (AD) for CFM International, S.A. (CFM) Model LEAP– 1A23, LEAP–1A24, LEAP–1A24E1, LEAP–1A26, LEAP–1A26CJ, LEAP– 1A26E1, LEAP–1A29, LEAP–1A29CJ, LEAP–1A30, LEAP–1A32, LEAP–1A33, LEAP–1A33B2, and LEAP–1A35A engines. This AD was prompted by detection of melt-related freckles in the billet, which may reduce the life of certain high-pressure turbine (HPT) rotor interstage seals. This AD requires removing the affected HPT rotor interstage seals from service and replacing with a part eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective June 10, 2024. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of June 10, 2024. ADDRESSES: AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA–2024–0030; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. Material Incorporated by Reference: SUMMARY: E:\FR\FM\06MYR1.SGM 06MYR1 37112 Federal Register / Vol. 89, No. 88 / Monday, May 6, 2024 / Rules and Regulations • For service information identified, contact CFM International, S.A., GE Aviation Fleet Support, 1 Neumann Way, M/D Room 285, Cincinnati, OH 45215; phone: (877) 432–3272; email: aviation.fleetsupport@ge.com. • You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call (817) 222–5110. It is also available at regulations.gov under Docket No. FAA–2024–0030. FOR FURTHER INFORMATION CONTACT: Mehdi Lamnyi, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (781) 238–7743; email: mehdi.lamnyi@ faa.gov. SUPPLEMENTARY INFORMATION: Background The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to CFM Model LEAP–1A23, LEAP–1A24, LEAP–1A24E1, LEAP– 1A26, LEAP–1A26CJ, LEAP–1A26E1, LEAP–1A29, LEAP–1A29CJ, LEAP– 1A30, LEAP–1A32, LEAP–1A33, LEAP– 1A33B2, and LEAP–1A35A engines. The NPRM published in the Federal Register on January 11, 2024 (89 FR 1847). The NPRM was prompted by detection of melt-related freckles in the billet, which may reduce the life of certain HPT rotor interstage seals. In the NPRM, the FAA proposed to require removing the affected HPT rotor interstage seals from service and replacing with a part eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products. Discussion of Final Airworthiness Directive Comments The FAA received no comments on the NPRM or on the determination of the costs. Conclusion The FAA reviewed the relevant data 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, this AD is adopted as proposed in the NPRM. Related Service Information Under 1 CFR Part 51 The FAA reviewed CFM Service Bulletin LEAP–1A–72–00–0492–01A– 930A–D, Issue 001–00, dated April 6, 2023, which provides the serial numbers of the affected HPT rotor interstage seals and specifies procedures for replacement of the HPT rotor interstage seal. 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 the ADDRESSES section. Costs of Compliance The FAA estimates that this AD affects 1 engine installed on an airplane of U.S. registry. The FAA estimates the following costs to comply with this AD: ddrumheller on DSK120RN23PROD with RULES1 ESTIMATED COSTS Action Labor cost Parts cost Cost per product Cost on U.S. operators Remove HPT rotor interstage seal ................. 225 work-hours × $85 per hour = $19,125 .... $168,000 $187,125 $187,125 Authority for This Rulemaking Title 49 of the United States Code specifies the FAA’s 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 Agency’s 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 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 VerDate Sep<11>2014 16:54 May 03, 2024 Jkt 262001 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 (3) Will 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. The Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: ■ PO 00000 Frm 00052 Fmt 4700 Sfmt 4700 Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive: ■ 2024–07–02 CFM International, S.A.: Amendment 39–22722; Docket No. FAA–2024–0030; Project Identifier AD– 2023–01066–E. (a) Effective Date This airworthiness directive (AD) is effective June 10, 2024. (b) Affected ADs None. (c) Applicability This AD applies to CFM International, S.A. (CFM) Model LEAP–1A23, LEAP–1A24, LEAP–1A24E1, LEAP–1A26, LEAP–1A26CJ, LEAP–1A26E1, LEAP–1A29, LEAP–1A29CJ, LEAP–1A30, LEAP–1A32, LEAP–1A33, LEAP–1A33B2, and LEAP–1A35A engines. (d) Subject Joint Aircraft System Component (JASC) Code 7250, Turbine Section. (e) Unsafe Condition This AD was prompted by detection of melt-related freckles in the billet, which may reduce the life of certain high-pressure E:\FR\FM\06MYR1.SGM 06MYR1 Federal Register / Vol. 89, No. 88 / Monday, May 6, 2024 / Rules and Regulations turbine (HPT) rotor interstage seals. The FAA is issuing this AD to prevent failure of the HPT rotor interstage seal. The unsafe condition, if not addressed, could result in release of uncontained debris, damage to the engine, and damage to the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions For engines with an affected HPT rotor interstage seal installed, before exceeding the applicable threshold specified in Table 1 of paragraph 3.E., Compliance, of CFM Service Bulletin (SB) LEAP–1A–72–00–0492–01A– 930A–D, Issue 001–00, dated April 6, 2023 (CFM SB LEAP–1A–72–00–0492–01A–930A– D, Issue 001–00), or at the next HPT rotor module exposure, whichever occurs first after the effective date of this AD, remove the affected HPT rotor interstage seal from service and replace it with a part eligible for installation. (h) Definitions (1) For the purpose of this AD, an ‘‘affected HPT rotor interstage seal’’ is any HPT rotor interstage seal having part number 2466M68P02 and a serial number listed in Table 1 of paragraph 3.E., Compliance, of CFM SB LEAP–1A–72–00–0492–01A–930A– D, Issue 001–00. (2) For the purpose of this AD, a ‘‘part eligible for installation’’ is any HPT rotor interstage seal having a serial number that is not listed in Table 1 of paragraph 3.E., Compliance, of CFM SB LEAP–1A–72–00– 0492–01A–930A–D, Issue 001–00. (3) For the purpose of this AD, an ‘‘HPT rotor module exposure’’ is an engine shop visit during which the HPT rotor assembly is fully removed from the engine core. ddrumheller on DSK120RN23PROD with RULES1 (i) Alternative Methods of Compliance (AMOCs) (1) The Manager, AIR–520 Continued Operational Safety 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 AIR–520 Continued Operational Safety Branch, send it to the attention of the person identified in paragraph (j) of this AD and email to ANEAD-AMOC@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. (j) Additional Information For more information about this AD, contact Mehdi Lamnyi, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (781) 238–7743; email: mehdi.lamnyi@faa.gov. (k) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference VerDate Sep<11>2014 19:59 May 03, 2024 Jkt 262001 (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) CFM International, S.A. Service Bulletin LEAP–1A–72–00–0492–01A–930A–D, Issue 001–00, dated April 6, 2023. (ii) [Reserved] (3) For service information, contact CFM International, S.A., GE Aviation Fleet Support, 1 Neumann Way, M/D Room 285, Cincinnati, OH 45215; phone: (877) 432– 3272; email: aviation.fleetsupport@ge.com. (4) You may view this service information at FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call (817) 222–5110. (5) You may view this material at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ ibr-locationsoremailfr.inspection@nara.gov. Issued on March 27, 2024. Victor Wicklund, Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2024–09564 Filed 5–3–24; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Highway Administration 23 CFR Part 490 37113 This document may be viewed online through the Federal eRulemaking portal at www.regulations.gov using the docket number listed above. Electronic retrieval help and guidelines are available on the website. It is available 24 hours each day, 365 days each year. An electronic copy of this document may also be downloaded by accessing the Office of the Federal Register’s website at: www.federalregister.gov and the U.S. Government Publishing Office’s website at: www.GovInfo.gov. FOR FURTHER INFORMATION CONTACT: For NHTSA: Program issues: Barbara Sauers, Associate Administrator, Regional Operations and Program Delivery, National Highway Traffic Safety Administration; Telephone number: (202) 366–0144; Email: barbara.sauers@dot.gov. Legal issues: Megan Brown, Attorney-Advisor, Office of the Chief Counsel, National Highway Traffic Safety Administration, 1200 New Jersey Avenue SE, Washington, DC 20590; Telephone number: (202) 366– 1834; Email: megan.brown@dot.gov. For FHWA: Kelly Morton, Office of Safety, (202) 366–8090 or via email at kelly.morton@dot.gov or Dawn Horan, Office of the Chief Counsel, (202) 366– 9615 or via email at dawn.horan@ dot.gov. Office hours are from 8 a.m. to 4:30 p.m., E.T., Monday through Friday, except Federal holidays. SUPPLEMENTARY INFORMATION: ADDRESSES: Table of Contents National Highway Traffic Safety Administration 23 CFR Part 1300 RIN 2127–AM45 Uniform Procedures for State Highway Safety Grant Programs National Highway Traffic Safety Administration (NHTSA), Federal Highway Administration (FHWA), U.S. Department of Transportation (DOT). ACTION: Final rule. AGENCY: This final rule amends the uniform procedures implementing the State Highway Safety Grant Program to waive, for Fiscal Year (FY) 2025, the requirement that targets for the common performance measures be identical to targets in the State Highway Safety Improvement Program. This final rule makes a corresponding change to a similar requirement in the FHWA’s performance management regulation. DATES: This final rule is effective May 6, 2024. SUMMARY: PO 00000 Frm 00053 Fmt 4700 Sfmt 4700 I. Background II. Waiver of Identical Targets for Common Performance Measures III. Waiver of Notice and Comment IV. Regulatory Analyses and Notices I. Background The NHTSA and the FHWA share three common performance measures in their highway safety programs—total fatalities, rate of fatalities, and total serious injuries—and have shared these common performance measure for many years. Both NHTSA and FHWA regulations require States to submit identical targets for the three common performance measures—in NHTSA’s triennial Highway Safety Plan (HSP) and in FHWA’s Highway Safety Improvement Program (HSIP) annual report. See 23 CFR 1300.11(b)(3)(ii)(C) and 490.209(a)(1), respectively. On November 15, 2021, the President signed into law the ‘‘Infrastructure Investment and Jobs Act’’ (known also as the Bipartisan Infrastructure Law, or BIL), Public Law 117–58. The BIL provided additional grant funds to States and changed several requirements to support States in their efforts to E:\FR\FM\06MYR1.SGM 06MYR1

Agencies

[Federal Register Volume 89, Number 88 (Monday, May 6, 2024)]
[Rules and Regulations]
[Pages 37111-37113]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2024-09564]


-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2024-0030; Project Identifier AD-2023-01066-E; 
Amendment 39-22722; AD 2024-07-02]
RIN 2120-AA64


Airworthiness Directives; CFM International, S.A. Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for CFM 
International, S.A. (CFM) Model LEAP-1A23, LEAP-1A24, LEAP-1A24E1, 
LEAP-1A26, LEAP-1A26CJ, LEAP-1A26E1, LEAP-1A29, LEAP-1A29CJ, LEAP-1A30, 
LEAP-1A32, LEAP-1A33, LEAP-1A33B2, and LEAP-1A35A engines. This AD was 
prompted by detection of melt-related freckles in the billet, which may 
reduce the life of certain high-pressure turbine (HPT) rotor interstage 
seals. This AD requires removing the affected HPT rotor interstage 
seals from service and replacing with a part eligible for installation. 
The FAA is issuing this AD to address the unsafe condition on these 
products.

DATES: This AD is effective June 10, 2024.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of June 10, 
2024.

ADDRESSES: 
    AD Docket: You may examine the AD docket at regulations.gov under 
Docket No. FAA-2024-0030; or in person at Docket Operations between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD 
docket contains this final rule, any comments received, and other 
information. The address for Docket Operations is U.S. Department of 
Transportation, Docket Operations, M-30, West Building Ground Floor, 
Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.
    Material Incorporated by Reference:

[[Page 37112]]

     For service information identified, contact CFM 
International, S.A., GE Aviation Fleet Support, 1 Neumann Way, M/D Room 
285, Cincinnati, OH 45215; phone: (877) 432-3272; email: 
[email protected].
     You may view this service information at the FAA, 
Airworthiness Products Section, Operational Safety Branch, 1200 
District Avenue, Burlington, MA 01803. For information on the 
availability of this material at the FAA, call (817) 222-5110. It is 
also available at regulations.gov under Docket No. FAA-2024-0030.

FOR FURTHER INFORMATION CONTACT: Mehdi Lamnyi, Aviation Safety 
Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: 
(781) 238-7743; email: [email protected].

SUPPLEMENTARY INFORMATION:

Background

    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 by adding an AD that would apply to CFM Model LEAP-1A23, 
LEAP-1A24, LEAP-1A24E1, LEAP-1A26, LEAP-1A26CJ, LEAP-1A26E1, LEAP-1A29, 
LEAP-1A29CJ, LEAP-1A30, LEAP-1A32, LEAP-1A33, LEAP-1A33B2, and LEAP-
1A35A engines. The NPRM published in the Federal Register on January 
11, 2024 (89 FR 1847). The NPRM was prompted by detection of melt-
related freckles in the billet, which may reduce the life of certain 
HPT rotor interstage seals. In the NPRM, the FAA proposed to require 
removing the affected HPT rotor interstage seals from service and 
replacing with a part eligible for installation. The FAA is issuing 
this AD to address the unsafe condition on these products.

Discussion of Final Airworthiness Directive

Comments

    The FAA received no comments on the NPRM or on the determination of 
the costs.

Conclusion

    The FAA reviewed the relevant data 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, this AD is adopted as proposed in the NPRM.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed CFM Service Bulletin LEAP-1A-72-00-0492-01A-930A-
D, Issue 001-00, dated April 6, 2023, which provides the serial numbers 
of the affected HPT rotor interstage seals and specifies procedures for 
replacement of the HPT rotor interstage seal. 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 the ADDRESSES section.

Costs of Compliance

    The FAA estimates that this AD affects 1 engine installed on an 
airplane of U.S. registry.
    The FAA estimates the following costs to comply with this AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                    Cost per       Cost on U.S.
               Action                        Labor cost           Parts cost        product         operators
----------------------------------------------------------------------------------------------------------------
Remove HPT rotor interstage seal....  225 work-hours x $85           $168,000         $187,125         $187,125
                                       per hour = $19,125.
----------------------------------------------------------------------------------------------------------------

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's 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 Agency's 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

    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
    (3) Will 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.

The Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
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]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive:

2024-07-02 CFM International, S.A.: Amendment 39-22722; Docket No. 
FAA-2024-0030; Project Identifier AD-2023-01066-E.

(a) Effective Date

    This airworthiness directive (AD) is effective June 10, 2024.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to CFM International, S.A. (CFM) Model LEAP-
1A23, LEAP-1A24, LEAP-1A24E1, LEAP-1A26, LEAP-1A26CJ, LEAP-1A26E1, 
LEAP-1A29, LEAP-1A29CJ, LEAP-1A30, LEAP-1A32, LEAP-1A33, LEAP-
1A33B2, and LEAP-1A35A engines.

(d) Subject

    Joint Aircraft System Component (JASC) Code 7250, Turbine 
Section.

(e) Unsafe Condition

    This AD was prompted by detection of melt-related freckles in 
the billet, which may reduce the life of certain high-pressure

[[Page 37113]]

turbine (HPT) rotor interstage seals. The FAA is issuing this AD to 
prevent failure of the HPT rotor interstage seal. The unsafe 
condition, if not addressed, could result in release of uncontained 
debris, damage to the engine, and damage to the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Required Actions

    For engines with an affected HPT rotor interstage seal 
installed, before exceeding the applicable threshold specified in 
Table 1 of paragraph 3.E., Compliance, of CFM Service Bulletin (SB) 
LEAP-1A-72-00-0492-01A-930A-D, Issue 001-00, dated April 6, 2023 
(CFM SB LEAP-1A-72-00-0492-01A-930A-D, Issue 001-00), or at the next 
HPT rotor module exposure, whichever occurs first after the 
effective date of this AD, remove the affected HPT rotor interstage 
seal from service and replace it with a part eligible for 
installation.

(h) Definitions

    (1) For the purpose of this AD, an ``affected HPT rotor 
interstage seal'' is any HPT rotor interstage seal having part 
number 2466M68P02 and a serial number listed in Table 1 of paragraph 
3.E., Compliance, of CFM SB LEAP-1A-72-00-0492-01A-930A-D, Issue 
001-00.
    (2) For the purpose of this AD, a ``part eligible for 
installation'' is any HPT rotor interstage seal having a serial 
number that is not listed in Table 1 of paragraph 3.E., Compliance, 
of CFM SB LEAP-1A-72-00-0492-01A-930A-D, Issue 001-00.
    (3) For the purpose of this AD, an ``HPT rotor module exposure'' 
is an engine shop visit during which the HPT rotor assembly is fully 
removed from the engine core.

(i) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, AIR-520 Continued Operational Safety 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 AIR-520 Continued 
Operational Safety Branch, send it to the attention of the person 
identified in paragraph (j) of this AD and email to [email protected].
    (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.

(j) Additional Information

    For more information about this AD, contact Mehdi Lamnyi, 
Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, 
WA 98198; phone: (781) 238-7743; email: [email protected].

(k) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless the AD specifies otherwise.
    (i) CFM International, S.A. Service Bulletin LEAP-1A-72-00-0492-
01A-930A-D, Issue 001-00, dated April 6, 2023.
    (ii) [Reserved]
    (3) For service information, contact CFM International, S.A., GE 
Aviation Fleet Support, 1 Neumann Way, M/D Room 285, Cincinnati, OH 
45215; phone: (877) 432-3272; email: [email protected].
    (4) You may view this service information at FAA, Airworthiness 
Products Section, Operational Safety Branch, 1200 District Avenue, 
Burlington, MA 01803. For information on the availability of this 
material at the FAA, call (817) 222-5110.
    (5) You may view this material at the National Archives and 
Records Administration (NARA). For information on the availability 
of this material at NARA, visit www.archives.gov/federal-register/cfr/[email protected]">www.archives.gov/federal-register/cfr/[email protected].

    Issued on March 27, 2024.
Victor Wicklund,
Deputy Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2024-09564 Filed 5-3-24; 8:45 am]
BILLING CODE 4910-13-P
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