Airworthiness Directives; CFM International, S.A. Engines, 104462-104465 [2024-30539]

Download as PDF 104462 Federal Register / Vol. 89, No. 246 / Monday, December 23, 2024 / Proposed Rules Deutsche Aircraft GmbH (Type Certificate Previously Held by 328 Support Services GmbH; AvCraft Aerospace GmbH; Fairchild Dornier GmbH; Dornier Luftfahrt GmbH): Docket No. FAA– 2024–2667; Project Identifier MCAI– 2024–00473–T. (a) Comments Due Date The FAA must receive comments on this airworthiness directive (AD) by February 6, 2025. (b) Affected ADs This AD replaces AD 2024–03–07, Amendment 39–22677 (89 FR 17723, March 12, 2024) (AD 2024–03–07). (c) Applicability This AD applies to all Deutsche Aircraft GmbH Model 328–100 and 328–300 airplanes, certificated in any category. (d) Subject Air Transport Association (ATA) of America Code 28, Fuel. (e) Unsafe Condition This AD was prompted by operator reports of worn and ruptured bonding straps inside the feeder wing tanks and in both outer and inner wing tanks. The FAA is issuing this AD to address damaged bonding straps. The unsafe condition, if not addressed, could result in the loss of bonding function and, in combination with a lightning strike, create a source of ignition in a fuel tank, possibly resulting in a fire or explosion and consequent loss of the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. khammond on DSK9W7S144PROD with PROPOSALS (h) Exceptions to EASA AD 2024–0154 (1) Where EASA AD 2024–0154 refers to July 26, 2023 (the effective date of EASA AD 2023–0137), this AD requires using April 16, 2024 (the effective date of AD 2024–03–07). (2) Where EASA AD 2024–0154 refers to its effective date, this AD requires using the effective date of this AD. (3) This AD does not adopt the ‘‘Remarks’’ section of EASA AD 2024–0154. (4) Where paragraph (3) of EASA AD 2024– 0154 specifies if ‘‘any damage is detected as defined in the inspection ASB,’’ this AD requires replacing those words with ‘‘any worn or ruptured bonding strap is detected.’’ (5) Where paragraph (4) of EASA AD 2024– 0154 specifies ‘‘Modification of an aeroplane in accordance with the instructions of the modification SB,’’ this AD requires replacing those words with ‘‘Accomplishing a modification, including doing detailed inspections, of an airplane in accordance with the instructions of the modification SB, and doing corrective actions if any worn or 16:28 Dec 20, 2024 Jkt 265001 (i) Additional AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, International Validation 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 responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the International Validation Branch, send it to the attention of the person identified in paragraph (j) of this AD and email to: AMOC@faa.gov. (i) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office. (2) Contacting the Manufacturer: For any requirement in this AD to obtain instructions from a manufacturer, the instructions must be accomplished using a method approved by the Manager, International Validation Branch, FAA; or EASA; or Deutsche Aircraft GmbH’s EASA Design Organization Approval (DOA). If approved by the DOA, the approval must include the DOA-authorized signature. (j) Additional Information For more information about this AD, contact Joe Salameh, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 206– 231–3536; email joe.salameh@faa.gov. (k) Material Incorporated by Reference (g) Requirements Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency (EASA) AD 2024–0154, dated August 2, 2024 (EASA AD 2024–0154). VerDate Sep<11>2014 ruptured bonding strap is detected as specified in paragraph (3).’’ (1) The Director of the Federal Register approved the incorporation by reference of the material listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this material as applicable to do the actions required by this AD, unless this AD specifies otherwise. (i) European Union Aviation Safety Agency (EASA) AD 2024–0154, dated August 2, 2024. (ii) [Reserved] (3) For EASA material identified in this AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +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 material at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. (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. PO 00000 Frm 00008 Fmt 4702 Sfmt 4702 Issued on December 17, 2024. Victor Wicklund, Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2024–30549 Filed 12–20–24; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2024–2668; Project Identifier AD–2024–00561–E] RIN 2120–AA64 Airworthiness Directives; CFM International, S.A. Engines Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: The FAA proposes to supersede Airworthiness Directive (AD) 2023–09–06, which applies to all CFM International, S.A. Model (CFM) 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 (LEAP–1A) engines. AD 2023–09–06 requires replacement of certain highpressure turbine (HPT) rotor stage 1 disks (HPT stage 1 disks), forward outer seals, and compressor rotor stages 6–10 spools. AD 2023–09–06 also prohibits installation of an HPT stage 1 disk, forward outer seal, or compressor rotor stages 6–10 spool that has a part number and serial number identified in the service information onto any engine. Since the FAA issued AD 2023–09–06, the manufacturer identified additional affected parts that were manufactured from material suspected to have reduced material properties due to iron inclusion, which prompted this AD. This proposed AD would retain the requirements to replace certain HPT stage 1 disks, forward outer seals, and compressor rotor stages 6–10 spools and expand the applicability to include additional affected parts manufactured from the same material suspected to have reduced material properties due to iron inclusion. The FAA is proposing this AD to address the unsafe condition on these products. DATES: The FAA must receive comments on this proposed AD by February 6, 2025. SUMMARY: You may send comments, using the procedures found in 14 CFR ADDRESSES: E:\FR\FM\23DEP1.SGM 23DEP1 Federal Register / Vol. 89, No. 246 / Monday, December 23, 2024 / Proposed Rules 11.43 and 11.45, by any of the following methods: • Federal eRulemaking Portal: Go to regulations.gov. Follow the instructions for submitting comments. • Fax: (202) 493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. • Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA–2024–2668; 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 NPRM, any comments received, and other information. The street address for Docket Operations is listed above. Material Incorporated by Reference: • For CFM material identified in this proposed AD, contact CFM, 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 material 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. 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: khammond on DSK9W7S144PROD with PROPOSALS Comments Invited The FAA invites you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under the ADDRESSES section. Include ‘‘Docket No. FAA–2024–2668; Project Identifier AD–2024–00561–E’’ at the beginning of your comments. The most helpful comments reference a specific portion of the proposal, explain the reason for any recommended change, and include supporting data. The FAA will consider all comments received by the closing date and may revise this proposal because of those comments. Except for Confidential Business Information (CBI) as described in the following paragraph, and other information as described in 14 CFR 11.35, the FAA will post all comments VerDate Sep<11>2014 16:28 Dec 20, 2024 Jkt 265001 received, without change, to regulations.gov, including any personal information you provide. The agency will also post a report summarizing each substantive verbal contact received about this NPRM. Confidential Business Information CBI is commercial or financial information that is both customarily and actually treated as private by its owner. Under the Freedom of Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public disclosure. If your comments responsive to this NPRM contain commercial or financial information that is customarily treated as private, that you actually treat as private, and that is relevant or responsive to this NPRM, it is important that you clearly designate the submitted comments as CBI. Please mark each page of your submission containing CBI as ‘‘PROPIN.’’ The FAA will treat such marked submissions as confidential under the FOIA, and they will not be placed in the public docket of this NPRM. Submissions containing CBI should be sent to Mehdi Lamnyi, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198. Any commentary that the FAA receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking. Background The FAA issued AD 2023–09–06, Amendment 39–22429 (88 FR 32092, May 19, 2023) (AD 2023–09–06), for all CFM Model LEAP–1A engines. AD 2023–09–06 was prompted by a manufacturer investigation that revealed that certain HPT stage 1 disks, forward outer seals, and compressor rotor stages 6–10 spools were manufactured from material suspected to have reduced material properties due to iron inclusion. AD 2023–09–06 requires replacement of certain HPT stage 1 disks, forward outer seals, and compressor rotor stages 6–10 spools. The agency issued AD 2023–09–06 to prevent fracture and consequent uncontained failure of certain HPT stage 1 disks, forward outer seals, and compressor rotor stages 6–10 spools. Actions Since AD 2023–09–06 Was Issued Since the FAA issued AD 2023–09– 06, further analysis by the manufacturer identified additional affected parts that were manufactured from material suspected to have reduced material properties due to iron inclusion. This condition, if not addressed, could result in uncontained debris release, damage PO 00000 Frm 00009 Fmt 4702 Sfmt 4702 104463 to the engine, and damage to the airplane. FAA’s Determination The FAA is issuing this NPRM after determining that the unsafe condition described previously is likely to exist or develop on other products of the same type design. Material Incorporated by Reference Under 1 CFR Part 51 The FAA reviewed CFM Service Bulletin LEAP–1A–72–00–0507–01A– 930A–D, Issue 001, dated January 24, 2024, which identifies the part numbers and serial numbers of HPT stage 1 disks, forward outer seals, and compressor rotor stages 6–10 spools with potentially reduced material properties and specifies procedures for replacement of these parts. This proposed AD would also require the following material, which the Director of the Federal Register approved for incorporation by reference as of June 23, 2023 (88 FR 32092, May 19, 2023): • CFM Service Bulletin LEAP–1A– 72–00–0470–01A–930A–D, Issue 003, dated March 3, 2023. • CFM Service Bulletin LEAP–1A– 72–00–0493–01A–930A–D, Issue 002, dated November 17, 2022. • CFM Service Bulletin LEAP–1A– 72–00–0496–01A–930A–D, Issue 001, dated March 7, 2023. This material 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. Proposed AD Requirements in This NPRM This proposed AD would retain all of the requirements of AD 2023–09–06. This proposed AD would require replacement of certain HPT stage 1 disks, forward outer seals, and compressor rotor stages 6–10 spools. This proposed AD would also prohibit installation of an HPT stage 1 disk, forward outer seal, or compressor rotor stages 6–10 spool that has a part number and serial number identified in the material incorporated by reference onto any engine. Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 42 engines installed on airplanes of U.S. registry. The FAA estimates the following costs to comply with this proposed AD: E:\FR\FM\23DEP1.SGM 23DEP1 104464 Federal Register / Vol. 89, No. 246 / Monday, December 23, 2024 / Proposed Rules ESTIMATED COSTS Action Labor cost Replace HPT stage 1 disk (42 affected parts). Replace forward outer seal (24 affected parts). Replace compressor rotor stages 6–10 spool (15 affected parts). 8 work-hours × $85 per hour = $680. 8 work-hours × $85 per hour = $680. 8 work-hours × $85 per hour = $680. 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. khammond on DSK9W7S144PROD with PROPOSALS 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 that the 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. The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, VerDate Sep<11>2014 16:28 Dec 20, 2024 Jkt 265001 $216,315 $9,085,230 $47,500 (pro-rated) ........................ 48,180 1,156,320 $37,660 (pro-rated) ........................ 38,340 575,100 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. [Amended] 2. The FAA amends § 39.13 by: a. Removing Airworthiness Directive 2023–09–06, Amendment 39–22429 (88 FR 32092, May 19, 2023); and ■ b. Adding the following new airworthiness directive: ■ ■ CFM International, S.A.: Docket No. FAA– 2024–2668; Project Identifier AD–2024– 00561–E. (a) Comments Due Date The FAA must receive comments on this airworthiness directive (AD) by February 6, 2025. (b) Affected ADs This AD replaces AD 2023–09–06, Amendment 39–22429 (88 FR 32092, May 19, 2023) (AD 2023–09–06). (c) Applicability This AD applies to CFM International, S.A. Model (CFM) 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 7230, Turbine Engine Compressor Section; 7250, Turbine Section. (e) Unsafe Condition This AD was prompted by a manufacturer investigation that revealed that certain highpressure turbine (HPT) rotor stage 1 disks (HPT stage 1 disks), forward outer seals, and compressor rotor stages 6–10 spools were manufactured from material suspected to have reduced material properties due to iron inclusion. The FAA is issuing this AD to prevent fracture and consequent uncontained failure of certain HPT stage 1 disks, forward outer seals, and compressor rotor stages 6–10 spools. The unsafe condition, if not addressed, could result in uncontained debris release, damage to the engine, and damage to the airplane. PO 00000 Frm 00010 Fmt 4702 Cost on U.S. operators $215,635 (pro-rated) ...................... the FAA proposes to amend 14 CFR part 39 as follows: § 39.13 Cost per product Parts cost Sfmt 4702 (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) For engines with an installed HPT stage 1 disk, forward outer seal or compressor rotor stages 6–10 spool having a part number (P/ N) and serial number (S/N) identified in Compliance, paragraph 3.E., Tables 1 through 9, of CFM Service Bulletin (SB) LEAP–1A– 72–00–0496–01A–930A–D, Issue 001, dated March 7, 2023 (CFM SB LEAP–1A–72–00– 0496–01A–930A–D): At the next piece-part exposure of the HPT stage 1 disk, forward outer seal, or compressor rotor stages 6–10 spool, as applicable, or before exceeding the applicable cycles since new (CSN) threshold identified in Compliance, paragraph 3.E., Tables 1 through 9, of CFM SB LEAP–1A– 72–00–0496–01A–930A–D, whichever occurs first after June 23, 2023 (the effective date of AD 2023–09–06); or if the applicable CSN threshold has been exceeded as of June 23, 2023 (the effective date of AD 2023–09–06), within 50 flight cycles (FCs) from June 23, 2023 (the effective date of AD 2023–09–06); remove the HPT stage 1 disk, forward outer seal, or compressor rotor stages 6–10 spool, as applicable, from service and replace with a part eligible for installation. (2) For engines with an installed forward outer seal having a P/N and S/N identified in Compliance, paragraph 3.E., Tables 1 through 2, of CFM SB LEAP–1A–72–00– 0470–01A–930A–D, Issue 003, dated March 3, 2023 (CFM SB LEAP–1A–72–00–0470– 01A–930A–D): At the next piece-part exposure of the forward outer seal, or before exceeding the applicable CSN threshold identified in Compliance, paragraph 3.E., Tables 1 through 2, of CFM SB LEAP–1A– 72–00–0470–01A–930A–D, whichever occurs first after June 23, 2023 (the effective date of AD 2023–09–06); or if the applicable CSN threshold has been exceeded as of June 23, 2023 (the effective date of AD 2023–09–06), within 50 FCs from June 23, 2023 (the effective date of AD 2023–09–06); remove the forward outer seal from service and replace with a part eligible for installation. (3) For engines with an installed HPT stage 1 disk having a P/N and S/N identified in Compliance, paragraph 3.E., Tables 1 through 2, of CFM SB LEAP–1A–72–00–0493–01A– 930A–D, Issue 002, dated November 17, 2022 (CFM SB LEAP–1A–72–00–0493–01A–930A– D): At the next piece-part exposure of the HPT stage 1 disk, or before exceeding the applicable CSN threshold identified in Compliance, paragraph 3.E., Tables 1 through E:\FR\FM\23DEP1.SGM 23DEP1 Federal Register / Vol. 89, No. 246 / Monday, December 23, 2024 / Proposed Rules 2, of CFM SB LEAP–1A–72–00–0493–01A– 930A–D, whichever occurs first after June 23, 2023 (the effective date of AD 2023–09–06); or if the applicable CSN threshold has been exceeded as of June 23, 2023 (the effective date of AD 2023–09–06), within 50 FCs from June 23, 2023 (the effective date of AD 2023– 09–06), remove the HPT stage 1 disk from service and replace with a part eligible for installation. (4) For engines with an installed HPT stage 1 disk having a P/N and S/N identified in Compliance, paragraph 3.E., Tables 1 through 2, of CFM SB LEAP–1A–72–00–0507–01A– 930A–D, Issue 001, dated January 24, 2024 (CFM SB LEAP–1A–72–00–0507–01A–930A– D): At the next piece-part exposure of the HPT stage 1 disk, or before exceeding the applicable CSN threshold identified in Compliance, paragraph 3.E., Tables 1 through 2, of CFM SB LEAP–1A–72–00–0507–01A– 930A–D, whichever occurs first after the effective date of this AD; or if the applicable CSN threshold has been exceeded as of the effective date of this AD, within 50 FCs from the effective date of this AD; remove the HPT stage 1 disk from service and replace with a part eligible for installation. (h) Definition For the purpose of this AD, a ‘‘part eligible for installation’’ is an HPT stage 1 disk, forward outer seal, or compressor rotor stages 6–10 spool that does not have a P/N and S/ N identified in the service information listed in paragraphs (g)(1) through (4) of this AD. (i) Installation Prohibition After the effective date of this AD, do not install an HPT stage 1 disk, forward outer seal, or compressor rotor stages 6–10 spool that has a P/N and S/N identified in the service information listed in paragraphs (g)(1) through (4) of this AD on any engine. khammond on DSK9W7S144PROD with PROPOSALS (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 AIR–520 Continued Operational Safety Branch, send it to the attention of the person identified in paragraph (k) of this AD and email to: 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 Mehdi Lamnyi, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (781) 238–7743; email: mehdi.lamnyi@faa.gov. (l) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference VerDate Sep<11>2014 16:28 Dec 20, 2024 Jkt 265001 (IBR) of the material listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this material as applicable to do the actions required by this AD, unless the AD specifies otherwise. (3) The following material was approved for IBR on [DATE 35 DAYS AFTER PUBLICATION OF THE FINAL RULE]. (i) CFM Service Bulletin LEAP–1A–72–00– 0507–01A–930A–D, Issue 001, dated January 24, 2024. (ii) [Reserved] (4) The following material was approved for IBR on June 23, 2023 (88 FR 32092, May 19, 2023). (i) CFM Service Bulletin LEAP–1A–72–00– 0470–01A–930A–D, Issue 003, dated March 3, 2023. (ii) CFM Service Bulletin LEAP–1A–72– 00–0493–01A–930A–D, Issue 002, dated November 17, 2022. (iii) CFM Service Bulletin LEAP–1A–72– 00–0496–01A–930A–D, Issue 001, dated March 7, 2023. (5) For CFM material identified in this AD, 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. (6) You may view this material 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. (7) 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-locations or email fr.inspection@nara.gov. Issued on December 17, 2024. Suzanne Masterson, Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2024–30539 Filed 12–20–24; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2024–2663; Project Identifier MCAI–2023–00200–R] RIN 2120–AA64 Airworthiness Directives; Airbus Helicopters Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus Helicopters Model EC225LP helicopters. This proposed AD SUMMARY: PO 00000 Frm 00011 Fmt 4702 Sfmt 4702 104465 was prompted by the identification of missing electrical bonding on a certain part-numbered additional and optional search light (search light). This proposed AD would require installing an electrical bonding braid modification and prohibit installing that partnumbered search light unless the modification is done. These actions are specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference. The FAA is proposing this AD to address the unsafe condition on these products. DATES: The FAA must receive comments on this NPRM by February 6, 2025. ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: • Federal eRulemaking Portal: Go to regulations.gov. Follow the instructions for submitting comments. • Fax: (202) 493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. • Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA–2024–2663; 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 NPRM, the mandatory continuing airworthiness information (MCAI), any comments received, and other information. The street address for Docket Operations is listed above. Material Incorporated by Reference: • For EASA material identified in this proposed AD, contact EASA, KonradAdenauer-Ufer 3, 50668 Cologne, Germany; phone: +49 221 8999 000; email: ADs@easa.europa.eu; website: easa.europa.eu. You may find the EASA material on the EASA website at ad.easa.europa.eu. • You may view this material at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N 321, Fort Worth, TX 76177. 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–2024–2663. FOR FURTHER INFORMATION CONTACT: Kurt Ladendorf, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: (817) 222– 5254; email: Kurt.D.Ladendorf@faa.gov. E:\FR\FM\23DEP1.SGM 23DEP1

Agencies

[Federal Register Volume 89, Number 246 (Monday, December 23, 2024)]
[Proposed Rules]
[Pages 104462-104465]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2024-30539]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2024-2668; Project Identifier AD-2024-00561-E]
RIN 2120-AA64


Airworthiness Directives; CFM International, S.A. Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD) 
2023-09-06, which applies to all CFM International, S.A. Model (CFM) 
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 (LEAP-1A) engines. AD 2023-09-06 requires replacement of 
certain high-pressure turbine (HPT) rotor stage 1 disks (HPT stage 1 
disks), forward outer seals, and compressor rotor stages 6-10 spools. 
AD 2023-09-06 also prohibits installation of an HPT stage 1 disk, 
forward outer seal, or compressor rotor stages 6-10 spool that has a 
part number and serial number identified in the service information 
onto any engine. Since the FAA issued AD 2023-09-06, the manufacturer 
identified additional affected parts that were manufactured from 
material suspected to have reduced material properties due to iron 
inclusion, which prompted this AD. This proposed AD would retain the 
requirements to replace certain HPT stage 1 disks, forward outer seals, 
and compressor rotor stages 6-10 spools and expand the applicability to 
include additional affected parts manufactured from the same material 
suspected to have reduced material properties due to iron inclusion. 
The FAA is proposing this AD to address the unsafe condition on these 
products.

DATES: The FAA must receive comments on this proposed AD by February 6, 
2025.

ADDRESSES: You may send comments, using the procedures found in 14 CFR

[[Page 104463]]

11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to regulations.gov. Follow 
the instructions for submitting comments.
     Fax: (202) 493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    AD Docket: You may examine the AD docket at regulations.gov under 
Docket No. FAA-2024-2668; 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 NPRM, any comments received, and other 
information. The street address for Docket Operations is listed above.
    Material Incorporated by Reference:
     For CFM material identified in this proposed AD, contact 
CFM, 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 material 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.

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:

Comments Invited

    The FAA invites you to send any written relevant data, views, or 
arguments about this proposal. Send your comments to an address listed 
under the ADDRESSES section. Include ``Docket No. FAA-2024-2668; 
Project Identifier AD-2024-00561-E'' at the beginning of your comments. 
The most helpful comments reference a specific portion of the proposal, 
explain the reason for any recommended change, and include supporting 
data. The FAA will consider all comments received by the closing date 
and may revise this proposal because of those comments.
    Except for Confidential Business Information (CBI) as described in 
the following paragraph, and other information as described in 14 CFR 
11.35, the FAA will post all comments received, without change, to 
regulations.gov, including any personal information you provide. The 
agency will also post a report summarizing each substantive verbal 
contact received about this NPRM.

Confidential Business Information

    CBI is commercial or financial information that is both customarily 
and actually treated as private by its owner. Under the Freedom of 
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public 
disclosure. If your comments responsive to this NPRM contain commercial 
or financial information that is customarily treated as private, that 
you actually treat as private, and that is relevant or responsive to 
this NPRM, it is important that you clearly designate the submitted 
comments as CBI. Please mark each page of your submission containing 
CBI as ``PROPIN.'' The FAA will treat such marked submissions as 
confidential under the FOIA, and they will not be placed in the public 
docket of this NPRM. Submissions containing CBI should be sent to Mehdi 
Lamnyi, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des 
Moines, WA 98198. Any commentary that the FAA receives which is not 
specifically designated as CBI will be placed in the public docket for 
this rulemaking.

Background

    The FAA issued AD 2023-09-06, Amendment 39-22429 (88 FR 32092, May 
19, 2023) (AD 2023-09-06), for all CFM Model LEAP-1A engines. AD 2023-
09-06 was prompted by a manufacturer investigation that revealed that 
certain HPT stage 1 disks, forward outer seals, and compressor rotor 
stages 6-10 spools were manufactured from material suspected to have 
reduced material properties due to iron inclusion. AD 2023-09-06 
requires replacement of certain HPT stage 1 disks, forward outer seals, 
and compressor rotor stages 6-10 spools. The agency issued AD 2023-09-
06 to prevent fracture and consequent uncontained failure of certain 
HPT stage 1 disks, forward outer seals, and compressor rotor stages 6-
10 spools.

Actions Since AD 2023-09-06 Was Issued

    Since the FAA issued AD 2023-09-06, further analysis by the 
manufacturer identified additional affected parts that were 
manufactured from material suspected to have reduced material 
properties due to iron inclusion. This condition, if not addressed, 
could result in uncontained debris release, damage to the engine, and 
damage to the airplane.

FAA's Determination

    The FAA is issuing this NPRM after determining that the unsafe 
condition described previously is likely to exist or develop on other 
products of the same type design.

Material Incorporated by Reference Under 1 CFR Part 51

    The FAA reviewed CFM Service Bulletin LEAP-1A-72-00-0507-01A-930A-
D, Issue 001, dated January 24, 2024, which identifies the part numbers 
and serial numbers of HPT stage 1 disks, forward outer seals, and 
compressor rotor stages 6-10 spools with potentially reduced material 
properties and specifies procedures for replacement of these parts.
    This proposed AD would also require the following material, which 
the Director of the Federal Register approved for incorporation by 
reference as of June 23, 2023 (88 FR 32092, May 19, 2023):
     CFM Service Bulletin LEAP-1A-72-00-0470-01A-930A-D, Issue 
003, dated March 3, 2023.
     CFM Service Bulletin LEAP-1A-72-00-0493-01A-930A-D, Issue 
002, dated November 17, 2022.
     CFM Service Bulletin LEAP-1A-72-00-0496-01A-930A-D, Issue 
001, dated March 7, 2023.
    This material 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.

Proposed AD Requirements in This NPRM

    This proposed AD would retain all of the requirements of AD 2023-
09-06. This proposed AD would require replacement of certain HPT stage 
1 disks, forward outer seals, and compressor rotor stages 6-10 spools. 
This proposed AD would also prohibit installation of an HPT stage 1 
disk, forward outer seal, or compressor rotor stages 6-10 spool that 
has a part number and serial number identified in the material 
incorporated by reference onto any engine.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would 
affect 42 engines installed on airplanes of U.S. registry.
    The FAA estimates the following costs to comply with this proposed 
AD:

[[Page 104464]]



                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
              Action                      Labor cost             Parts cost           product        operators
----------------------------------------------------------------------------------------------------------------
Replace HPT stage 1 disk (42        8 work-hours x $85     $215,635 (pro-rated).        $216,315      $9,085,230
 affected parts).                    per hour = $680.
Replace forward outer seal (24      8 work-hours x $85     $47,500 (pro-rated)..          48,180       1,156,320
 affected parts).                    per hour = $680.
Replace compressor rotor stages 6-  8 work-hours x $85     $37,660 (pro-rated)..          38,340         575,100
 10 spool (15 affected parts).       per hour = $680.
----------------------------------------------------------------------------------------------------------------

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

    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 that the 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.

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 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:
0
a. Removing Airworthiness Directive 2023-09-06, Amendment 39-22429 (88 
FR 32092, May 19, 2023); and
0
b. Adding the following new airworthiness directive:

CFM International, S.A.: Docket No. FAA-2024-2668; Project 
Identifier AD-2024-00561-E.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by February 6, 2025.

(b) Affected ADs

    This AD replaces AD 2023-09-06, Amendment 39-22429 (88 FR 32092, 
May 19, 2023) (AD 2023-09-06).

(c) Applicability

    This AD applies to CFM International, S.A. Model (CFM) 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 7230, Turbine Engine 
Compressor Section; 7250, Turbine Section.

(e) Unsafe Condition

    This AD was prompted by a manufacturer investigation that 
revealed that certain high-pressure turbine (HPT) rotor stage 1 
disks (HPT stage 1 disks), forward outer seals, and compressor rotor 
stages 6-10 spools were manufactured from material suspected to have 
reduced material properties due to iron inclusion. The FAA is 
issuing this AD to prevent fracture and consequent uncontained 
failure of certain HPT stage 1 disks, forward outer seals, and 
compressor rotor stages 6-10 spools. The unsafe condition, if not 
addressed, could result in uncontained debris release, 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

    (1) For engines with an installed HPT stage 1 disk, forward 
outer seal or compressor rotor stages 6-10 spool having a part 
number (P/N) and serial number (S/N) identified in Compliance, 
paragraph 3.E., Tables 1 through 9, of CFM Service Bulletin (SB) 
LEAP-1A-72-00-0496-01A-930A-D, Issue 001, dated March 7, 2023 (CFM 
SB LEAP-1A-72-00-0496-01A-930A-D): At the next piece-part exposure 
of the HPT stage 1 disk, forward outer seal, or compressor rotor 
stages 6-10 spool, as applicable, or before exceeding the applicable 
cycles since new (CSN) threshold identified in Compliance, paragraph 
3.E., Tables 1 through 9, of CFM SB LEAP-1A-72-00-0496-01A-930A-D, 
whichever occurs first after June 23, 2023 (the effective date of AD 
2023-09-06); or if the applicable CSN threshold has been exceeded as 
of June 23, 2023 (the effective date of AD 2023-09-06), within 50 
flight cycles (FCs) from June 23, 2023 (the effective date of AD 
2023-09-06); remove the HPT stage 1 disk, forward outer seal, or 
compressor rotor stages 6-10 spool, as applicable, from service and 
replace with a part eligible for installation.
    (2) For engines with an installed forward outer seal having a P/
N and S/N identified in Compliance, paragraph 3.E., Tables 1 through 
2, of CFM SB LEAP-1A-72-00-0470-01A-930A-D, Issue 003, dated March 
3, 2023 (CFM SB LEAP-1A-72-00-0470-01A-930A-D): At the next piece-
part exposure of the forward outer seal, or before exceeding the 
applicable CSN threshold identified in Compliance, paragraph 3.E., 
Tables 1 through 2, of CFM SB LEAP-1A-72-00-0470-01A-930A-D, 
whichever occurs first after June 23, 2023 (the effective date of AD 
2023-09-06); or if the applicable CSN threshold has been exceeded as 
of June 23, 2023 (the effective date of AD 2023-09-06), within 50 
FCs from June 23, 2023 (the effective date of AD 2023-09-06); remove 
the forward outer seal from service and replace with a part eligible 
for installation.
    (3) For engines with an installed HPT stage 1 disk having a P/N 
and S/N identified in Compliance, paragraph 3.E., Tables 1 through 
2, of CFM SB LEAP-1A-72-00-0493-01A-930A-D, Issue 002, dated 
November 17, 2022 (CFM SB LEAP-1A-72-00-0493-01A-930A-D): At the 
next piece-part exposure of the HPT stage 1 disk, or before 
exceeding the applicable CSN threshold identified in Compliance, 
paragraph 3.E., Tables 1 through

[[Page 104465]]

2, of CFM SB LEAP-1A-72-00-0493-01A-930A-D, whichever occurs first 
after June 23, 2023 (the effective date of AD 2023-09-06); or if the 
applicable CSN threshold has been exceeded as of June 23, 2023 (the 
effective date of AD 2023-09-06), within 50 FCs from June 23, 2023 
(the effective date of AD 2023-09-06), remove the HPT stage 1 disk 
from service and replace with a part eligible for installation.
    (4) For engines with an installed HPT stage 1 disk having a P/N 
and S/N identified in Compliance, paragraph 3.E., Tables 1 through 
2, of CFM SB LEAP-1A-72-00-0507-01A-930A-D, Issue 001, dated January 
24, 2024 (CFM SB LEAP-1A-72-00-0507-01A-930A-D): At the next piece-
part exposure of the HPT stage 1 disk, or before exceeding the 
applicable CSN threshold identified in Compliance, paragraph 3.E., 
Tables 1 through 2, of CFM SB LEAP-1A-72-00-0507-01A-930A-D, 
whichever occurs first after the effective date of this AD; or if 
the applicable CSN threshold has been exceeded as of the effective 
date of this AD, within 50 FCs from the effective date of this AD; 
remove the HPT stage 1 disk from service and replace with a part 
eligible for installation.

 (h) Definition

    For the purpose of this AD, a ``part eligible for installation'' 
is an HPT stage 1 disk, forward outer seal, or compressor rotor 
stages 6-10 spool that does not have a P/N and S/N identified in the 
service information listed in paragraphs (g)(1) through (4) of this 
AD.

(i) Installation Prohibition

    After the effective date of this AD, do not install an HPT stage 
1 disk, forward outer seal, or compressor rotor stages 6-10 spool 
that has a P/N and S/N identified in the service information listed 
in paragraphs (g)(1) through (4) of this AD on any engine.

(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 AIR-520 Continued Operational 
Safety Branch, send it to the attention of the person identified in 
paragraph (k) 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.

(k) 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].

(l) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the material listed in this 
paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this material as applicable to do the actions 
required by this AD, unless the AD specifies otherwise.
    (3) The following material was approved for IBR on [DATE 35 DAYS 
AFTER PUBLICATION OF THE FINAL RULE].
    (i) CFM Service Bulletin LEAP-1A-72-00-0507-01A-930A-D, Issue 
001, dated January 24, 2024.
    (ii) [Reserved]
    (4) The following material was approved for IBR on June 23, 2023 
(88 FR 32092, May 19, 2023).
    (i) CFM Service Bulletin LEAP-1A-72-00-0470-01A-930A-D, Issue 
003, dated March 3, 2023.
    (ii) CFM Service Bulletin LEAP-1A-72-00-0493-01A-930A-D, Issue 
002, dated November 17, 2022.
    (iii) CFM Service Bulletin LEAP-1A-72-00-0496-01A-930A-D, Issue 
001, dated March 7, 2023.
    (5) For CFM material identified in this AD, 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].
    (6) You may view this material 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.
    (7) 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-locations or email [email protected].

    Issued on December 17, 2024.
Suzanne Masterson,
Deputy Director, Integrated Certificate Management Division, Aircraft 
Certification Service.
[FR Doc. 2024-30539 Filed 12-20-24; 8:45 am]
BILLING CODE 4910-13-P
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