Airworthiness Directive · Amendment 39-21110 · Turbine section
International Aero Engines AG (IAE) Turbofan Engines
This AD applies to all International Aero Engines AG (IAE) V2522-A5, V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, and V2533-A5 model turbofan engines with a high-pressure turbine (HPT) 1st-stage disk, part number (P/N) 2A5001 and serial number PKLBR37442, PKLBR38359, PKLBR73862, PKLBR73289, PKLBR73270, PKLBR38981, PKLBR38661, PKLBR40207, PKLBR37445, PKLBR73861, PKLBR73268, PKLBR38629, PKLBSC8047, or PKLBR38979, installed.
The FAA is adopting a new airworthiness directive (AD) for certain International Aero Engines AG (IAE) V2522-A5, V2524-A5, V2525- D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, and V2533-A5 model turbofan engines. This emergency AD was sent previously to all known U.S. owners and operators of these engines. This AD requires removal of affected high-pressure turbine (HPT) 1st-stage disks from service. This AD was prompted by investigative findings from an event involving an uncontained failure of a HPT 1st-stage disk that resulted in high-energy debris penetrating the engine cowling. The FAA is issuing this AD to address the unsafe condition on these products.
(1) For affected IAE model turbofan engines with an engine serial number and HPT 1st-stage disk serial number listed in Table 1 to paragraph (g)(1) of this AD, within 5 flight cycles after the effective date of this AD, remove the HPT 1st-stage disk from service.
(2) For all other affected IAE model turbofan engines, review the engine records within 3 calendar days after the effective date of this AD to determine if an HPT 1st-stage disk with serial number PKLBR37442, PKLBR38661, or PKLBR40207 is installed in the engine. If an affected HPT 1st-stage disk is installed, within 5 flight cycles after this determination, remove the affected HPT 1st-stage disk from service.
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.
