1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 2. The FAA amends § 39.13 by: a. Removing Airworthiness Directive 2024-06-02, Amendment 39-22707 (89 FR 21196, March 27, 2024); and b. Adding the following new airworthiness directive: 2025-18-08 GE Aviation Czech s.r.o. (Type Certificate Previously Held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s.): Amendment 39-23135; Docket No. FAA-2025-0627; Project Identifier MCAI-2024-00608-E. (a) Effective Date This airworthiness directive (AD) is effective October 21, 2025. (b) Affected ADs This AD replaces AD 2024-06-02, Amendment 39-22707 (89 FR 21196, March 27, 2024) (AD 2024-06-02). (c) Applicability This AD applies to GE Aviation Czech s.r.o. (GEAC) (type certificate previously held by WALTER Engines a.s. Walter a.s., and MOTORLET a.s.) Model M601D-11, M601E-11, M601E-11A, M601E-11AS, M601E-11S, and M601F engines. (d) Subject Joint Aircraft System Component (JASC) Codes 7120, Engine Mount Section; 7230, Turbine Engine Compressor Section. (e) Unsafe Condition This AD was prompted by a report of a crack on the centrifugal compressor case mount pad weld area caused by a non-conforming weld (lack of welding penetration). The FAA is issuing this AD to prevent failure of the centrifugal compressor case. The unsafe condition, if not addressed, could result in crack propagation, possibly resulting in engine separation and reduced control of the airplane. (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 2024-0194, dated October 15, 2024 (EASA AD 2024-0194). (h) Exceptions to EASA AD 2024-0194 (1) Where EASA AD 2024-0194 requires compliance from its effective date, this AD requires using the effective date of this AD. (2) Where EASA AD 2024-0194 defines serviceable part as "Centrifugal compressor case, eligible for installation in accordance with GEAC instructions, which is not an affected part", this AD requires replacing that text with "centrifugal compressor case, eligible for installation, which is not an affected part". (3) Where EASA AD 2024-0194 specifies "Replacing the affected part of an engine with a centrifugal compressor case, eligible for installation in accordance with GEAC instructions, which is not an affected part", this AD requires replacing that text with "Replacing the affected part of an engine with a centrifugal compressor case, eligible for installation, which is not an affected part". (4) Where EASA AD 2024-0194 specifies to contact the manufacturer for approved instructions if any crack is detected on an affected part, this AD requires replacement of the compressor case. (5) This AD does not adopt the "Remarks" paragraph of EASA AD 2024-0194. (i) Alternative Methods of Compliance (AMOCs) The Manager, AIR-730 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 local Flight Standards District Office, as appropriate. If sending information directly to the manager of the AIR-730 International Validation Branch, send it to the attention of the person identified in paragraph (j) of this AD and email to:
[email protected]. (j) Additional Information For more information about this AD, contact Robert Charbonneau, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: (781) 238-7132; email:
[email protected] . (k) Material Incorporated by Reference (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 the AD specifies otherwise. (i) European Union Aviation Safety Agency (EASA) AD 2024-0194, dated October 15, 2024. (ii) [Reserved] (3) For EASA material identified in this AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; phone: +49 221 8999 000; email:
[email protected]; 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 FAA, 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-locations or email
[email protected] . Issued on September 3, 2025. Steven W. Thompson, Acting Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2025-17852 Filed 9-15-25; 8:45 am]BILLING CODE 4910-13-P
