Airworthiness Directive · Amendment 39-23407 · CFM International S.A. Engines
CFM International S.A. Engines
This AD applies to CFM International S.A. LEAP-1A23, LEAP-1A24, LEAP-1A24E1, LEAP-1A26, LEAP-1A26CJ, LEAP-1A26E1, LEAP-1A29, LEAP-1A29CJ, LEAP-1A30, LEAP-1A32, LEAP-1A33, LEAP-1A33B2, LEAP-1A35A.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
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.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
