Airworthiness directives › 2024-06-14
AD 2024-06-14 Airworthiness Directives; International Aero Engines, LLC Engines
Models named: PW1124G1-JM, PW1127G-JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM, PW1133G-JM, PW1133GA-JM. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
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).
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(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.
Unsafe condition
This AD was prompted by a report that certain 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. The FAA is issuing this AD to prevent material degradation and fracture of the HPC 2nd stage rotor and HPC 4th stage rotor. The unsafe condition, if not addressed, could result in uncontained part release or dual-engine shutdown, damage to engine, damage to airplane, and loss of the airplane.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1