Engine - High-pressure Compressor 2nd and 4th Stage Rotors - Replacement
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must remove and replace the identified HPC 2nd and 4th stage rotors at the next engine shop visit after June 3, 2024, with parts eligible for installation as defined by the AD. Compliance must follow the procedures in Pratt & Whitney Alert Service Bulletin Issue 002 or earlier Issue 001 for credit if performed before the effective date. Operators should review affected part numbers and serial numbers in the service bulletin to determine applicability.
Summary
The Federal Register document titled "Engine - High-pressure Compressor 2nd and 4th Stage Rotors - Replacement" is a final rule airworthiness directive (AD 2024-06-14) issued by the FAA affecting International Aero Engines, LLC Model PW1124G1-JM, PW1127G-JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM, PW1133G-JM, and PW1133GA-JM engines. It addresses potential degradation and fracture risks in the high-pressure compressor 2nd and 4th stage rotors due to improper cleaning procedures. The AD mandates replacement of certain affected rotors to ensure continued airworthiness and safety.
What changed
This new airworthiness directive introduces mandatory replacement of specific HPC 2nd and 4th stage rotors identified by part and serial numbers due to degraded knife-edge seals and abrasive coating damage caused by alkaline cleaning without proper masking. It incorporates the latest Pratt & Whitney Alert Service Bulletin PW1000G-C-72-00-0208-00A-930A-D, Issue 002, dated January 18, 2024, clarifying compliance requirements and providing credit for prior actions under the previous service bulletin issue.
Why it matters
This AD is critical for aviation professionals because operating engines with degraded HPC rotors can lead to rotor fracture, uncontained engine failure, or dual-engine shutdown, posing serious safety risks. Operators and maintenance organizations must ensure compliance to prevent potential damage to aircraft and loss of life. The directive also clarifies acceptable service bulletin versions, aiding in regulatory compliance and maintenance planning.
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- EASA AD US-2024-05-11Engine - High-Pressure Turbine 1st / 2nd Stage Hub / High Pressure Compressor 7th and 8th Stage Integrally Bladed Rotors / Rear Hub - Inspection / ReplacementApr 9, 2024
- EASA AD US-2023-20-11
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New ADs and bulletins for International Aero Engines PW1100 and Aero Engines PW1400, summarized like this page, every Monday.