Airworthiness Directive 2021-11-51
one-timeAirworthiness Directives; International Aero Engines AG Turbofan Engines
What this AD requires
The FAA is adopting a new airworthiness directive (AD) for certain International Aero Engines AG (IAE) V2522-A5, V2524-A5, V2527- A5, V2527E-A5, V2527M-A5, V2530-A5, and V2533-A5 model turbofan engines. This AD was prompted by a review of investigative findings from an event involving an uncontained failure of a high-pressure turbine (HPT) 1st-stage disk that resulted in high-energy debris penetrating the engine cowling. This AD requires an ultrasonic inspection (USI) of affected HPT 1st-stage disks and HPT 2nd-stage disks and, depending on the results of the USI, removal of the affected HPT 1st-stage and HPT 2nd-stage disks from service. The FAA previously sent an emergency AD to all known U.S. owners and operators of these engines and is now issuing this AD to address the unsafe condition on these products.
Which aircraft AD 2021-11-51 applies to
Applies only to engines with an HPT 1st-stage disk, P/N 2A5001 (S/N PKLBR34908, PKLBR59989, PKLBR83471, PKLBSC9996, PKLBSG0105, PKLBSG9043, or PKLBSH1829), or HPT 2nd-stage disk, P/N 2A4802 (S/N PKLBR87800, PKLBR88708, PKLBR89452, PKLBSA9907, PKLBSH9246, PKLBSC8066, PKLBSC8077, or PKLBSG2213), installed.
Whether AD 2021-11-51 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.
How AD compliance is recorded
A valid compliance record (14 CFR 43.9) states:
Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.
Look up a tail number →Read the full directive (Federal Register)Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.