Transportation Department, Federal Aviation Administration
The FAA is superseding Airworthiness Directive (AD) 2025-21- 03, which applied to certain 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. AD 2025-21-03 required initial and repetitive borescope inspections (BSIs) of the high-pressure turbine (HPT) rotor stage 1 blades. Depending on the results of the BSIs, AD 2025-21-03 required either additional BSIs at reduced intervals or replacement of the HPT rotor stage 1 blades. Since the FAA issued AD 2025-21-03, the manufacturer published updated service material and determined that engines operating in the South Asia region are susceptible to accelerated HPT rotor stage 1 blade deterioration and airfoil distress. This AD requires initial and repetitive BSIs of the HPT rotor stage 1 blades and, depending on the results of the inspections, additional BSIs at reduced intervals or replacement of the HPT rotor stage 1 blades. The FAA is issuing this AD to address the unsafe condition on these products.
Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Department of Transportation Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2026-7214; Project Identifier AD-2026-00225-E; Amendment 39-23407; AD 2026-14-06] RIN 2120-AA64 AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule; request for comments. SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2025-21-03, which applied to certain 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. AD 2025-21-03 required initial and repetitive borescope inspections (BSIs) of the high-pressure turbine (HPT) rotor stage 1 blades. Depending on the results of the BSIs, AD 2025-21-03 required either additional BSIs at ( printed page 42650) reduced intervals or replacement of the HPT rotor stage 1 blades. Since the FAA issued AD 2025-21-03, the manufacturer published updated service material and determined that engines operating in the South Asia region are susceptible to accelerated HPT rotor stage 1 blade deterioration and airfoil distress. This AD requires initial and repetitive BSIs of the HPT rotor stage 1 blades and, depending on the results of the inspections, additional BSIs at reduced intervals or replacement of the HPT rotor stage 1 blades. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective July 27, 2026. The Director of the Federal Register…
Citation: 91 FR 42649
