Airworthiness Directive · Amendment 39-21626 · Turbine section
International Aero Engines AG Turbofan Engines
This AD applies to International Aero Engines AG (IAE) V2522-A5, V2524-A5, V2527-A5, V2527E-A5, V2527M-A5, V2530-A5, and V2533-A5 model turbofan engines with:
(1) A high-pressure turbine (HPT) 1st-stage disk, part number (P/N) 2A5001, with serial number (S/N), PKLBR34908, PKLBR59989, PKLBR83471, PKLBSC9996, PKLBSG0105, PKLBSG9043 or PKLBSH1829, installed; or
(2) An HPT 2nd-stage disk, P/N 2A4802, with S/N PKLBR87800, PKLBR88708 PKLBR89452, PKLBSA9907, PKLBSH9246, PKLBSC8066, PKLBSC8077, or PKLBSG2213, installed.
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.
(1) For affected engines with an installed HPT 1st-stage disk listed in Table 1 to paragraph (g)(1) of this AD, within 10 flight cycles after the effective date of this AD, perform an ultrasonic inspection (USI) of the HPT 1st-stage disk using the Accomplishment Instructions, paragraph 6, of IAE Non-Modification Service Bulletin (NMSB) V2500-ENG-72-0713, Revision 1, dated January 26, 2021 (IAE NMSB V2500-ENG-72-0713).
(2) For affected engines with an installed HPT 2nd-stage disk listed in Table 2 to paragraph (g)(2) of this AD, within 10 flight cycles after the effective date of this AD, perform a USI of the HPT 2nd-stage disk using the Accomplishment Instructions, paragraph 7, of IAE NMSB V2500-ENG-72-0713.
(3) If, during the USI required by paragraphs (g)(1) and (2) of this AD, an HPT 1st-stage disk or HPT 2nd-stage disk does not pass the USI as specified in the Accomplishment Instructions, paragraph 8., of IAE NMSB V2500-ENG-72-0713, Revision 1, before further flight, remove the HPT 1st-stage disk or 2nd-stage disk, as applicable, from service and replace with a part eligible for installation.
For the purpose for this AD, a “part eligible for installation” is:
(1) An HPT 1st-stage disk or HPT 2nd-stage disk listed in Appendix A, Tables 1 and 2, of IAE NMSB V2500-ENG-72-0713, or Appendix A, Tables 1 and 2, of IAE NMSB V2500-E5-72-0015, dated December 15, 2020 (IAE NMSB V2500-E5-72-0015) that has passed the USI as specified in the Accomplishment Instructions, paragraph 8., of IAE NMSB V2500-ENG-72-0713 or NMSB V2500-E5-72-0015, or
(2) An HPT 1st-stage disk or HPT 2nd-stage disk that is not listed in Appendix A, Tables 1 and 2, of IAE NMSB V2500-ENG-72-0713 or Appendix A, Tables 1 and 2, of IAE NMSB V2500-E5-72-0015.
