2025-17-16: Turbine Engine Compressor Sections

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 adding the following new airworthiness directive: 2025-17-16 International Aero Engines AG: Amendment 39-23126; Docket No. FAA-2024-2423; Project Identifier AD-2024-00320-E. (a) Effective Date This airworthiness directive (AD) is effective October 10, 2025. (b) Affected ADs None. (c) Applicability This AD applies to International Aero Engines AG (IAE AG) Model V2522-A5, V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, V2531-E5, and V2533-A5 engines. (d) Subject Joint Aircraft System Component (JASC) Code 7250, Turbine Engine Compressor Sections. (e) Unsafe Condition This AD was prompted by further analysis of an event involving an IAE AG model V2533-A5 engines that experienced an uncontained high-pressure turbine (HPT) 1st-stage hub failure that resulted in high-energy debris penetrating the engine cowling. The FAA is issuing this AD to prevent failure of the HPT 1st-stage hub and HPT 2nd-stage hub. The unsafe condition, if not addressed, could result in an uncontained hub failure, release of high-energy debris, damage to the engine, damage to the airplane, and loss of the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Action (1) Within 90 days after the effective date of this AD, revise paragraph B.1 of the Maintenance Scheduling section in the airworthiness limitations section (ALS) of the Instructions for Continued Airworthiness (ICA) located in the applicable existing Time Limits Manual (TLM), as listed in paragraphs (g)(1)(i) through (iii) of this AD, by incorporating the information specified in table 1 to paragraph (g) of this AD: (i) Part Number (P/N) 2A4408, TASK 05-10-00-990-000-B00 Instructions For Continued Airworthiness (V2500-A5); (ii) P/N 2A4417, TASK 05-10-00-990-000 Instructions For Continued Airworthiness (V2500-D5); (iii) P/N 2A4384, TASK 05-10-00-990-000-A00 Instructions For Continued Airworthiness (V2500-E5). (2) For air carrier operations, within 90 days after the effective date of this AD, revise the existing approved maintenance or inspection program, as applicable, by incorporating the information specified in table 1 to paragraph (g) of this AD, as applicable. Table 1 to Paragraph (g)-ALS Additional Inspections Part nomenclature Part No. Inspection (engine manual reference) HPT Stage 1 Hub 2A5001 TASK 72-45-11-200-006. HPT Stage 2 Hub 2A4802 TASK 72-45-31-200-009. (h) Provisions for Alternative Actions After the actions required by paragraph (g)(1) and (2) of this AD have been done, no alternative actions are allowed unless they are approved as specified in the provisions of paragraph (i) of this AD. (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: 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 Carol Nguyen, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (781) 238-7655; email: carol.nguyen@faa.gov. (k) Material Incorporated by Reference None. Issued on August 28, 2025. Peter A. White, Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2025-17066 Filed 9-4-25; 8:45 am]BILLING CODE 4910-13-P