Airworthiness Directive · Amendment 39-22719 · Turbine engine compressor section
International Aero Engines, LLC Engines
This AD applies to International Aero Engines, LLC Model PW1124G1-JM, PW1127G-JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM, PW1133G-JM, and PW1133GA-JM engines having a high-pressure compressor (HPC) 2nd stage rotor or HPC 4th stage rotor having a part number and serial number identified in the Applicability, Table 2, of Pratt & Whitney (PW) Alert Service Bulletin (ASB) PW1000G-C-72-00-0208-00A-930A-D, Issue 002, dated January 18, 2024 (PW ASB PW1000G-C-72-00-0208-00A-930A-D, Issue 002).
The FAA is adopting a new airworthiness directive (AD) for certain International Aero Engines, LLC (IAE) Model PW1124G1-JM, PW1127G-JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM, PW1133G-JM, and PW1133GA-JM engines. This AD was prompted by a report that certain high-pressure compressor (HPC) 2nd stage rotors and HPC 4th stage rotors have potentially degraded knife-edge seals and abrasive coating of the rear wing 4th stage rotor due to having been cleaned in alkaline solution without masking the knife-edge seal coating. Operating in this condition could result in material degradation and fracture of the HPC 2nd stage rotor and HPC 4th stage rotor. This AD requires replacement of certain HPC 2nd stage rotors and HPC 4th stage rotors. The FAA is issuing this AD to address the unsafe condition on these products.
(1) At the next engine shop visit after the effective date of this AD, remove the HPC 2nd stage rotor having a part number and serial number identified in the Applicability, Table 2, of PW ASB PW1000G-C-72-00-0208-00A-930A-D, Issue 002, and replace with a part eligible for installation.
(2) At the next engine shop visit after the effective date of this AD, remove the HPC 4th stage rotor having a part number and serial number identified in the Applicability, Table 2, of PW ASB PW1000G-C-72-00-0208-00A-930A-D, Issue 002, and replace with a part eligible for installation.
(1) For the purposes of this AD, a “part eligible for installation” is:
(i) Any HPC 2nd stage rotor or HPC 4th stage rotor, as applicable, that does not have a part number and serial number identified in the Applicability, Table 2, of PW ASB PW1000G-C-72-00-0208-00A-930A-D, Issue 002; or
(ii) Any HPC 2nd stage rotor or HPC 4th stage rotor, as applicable, that has incorporated PW ASB PW1000G-C-72-00-0208-00A-930A-D, Issue 002.
(2) For the purposes of this AD, an “engine shop visit” is the induction of an engine into the shop for maintenance involving the separation of the “H” flange.
