AD NUMBER: 2020-05-28

PRODUCT: All International Aero Engines, LLC (IAE) PW1133G-JM, PW1133GA-JM, PW1130G-JM, PW1129GJM, PW1127G-JM, PW1127GA-JM, PW1127G1-JM, PW1124G-JM, PW1124G1-JM, and PW1122G-JM model turbofan engines.

ACTION: Final rule

SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2019-11-08 for all International Aero Engines, LLC (IAE) PW1133G-JM, PW1133GA-JM, PW1130G-JM, PW1129GJM, PW1127G-JM, PW1127GA-JM, PW1127G1-JM, PW1124G-JM, PW1124G1-JM, and PW1122G-JM model turbofan engines.

AD 2019-11-08 required the removal of the main gearbox (MGB) assembly and electronic engine control (EEC) software and the installation of a part and software version eligible for installation for engines that operate on extended operations (ETOPS) flights.

This AD retains the requirements of AD 2019-11-08 and requires replacement of the MGB assembly and EEC software on engines that do not operate on ETOPS flights.

This AD was prompted by multiple reports of in-flight engine shutdowns as the result of high-cycle fatigue causing fracture of certain parts of the MGB assembly.

DATES: This AD is effective April 21, 2020.

COST: The FAA estimates that this AD affects 72 engines installed on airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:

Replace the MGB assembly

• Labor: 13 work-hours × $85 per hour = $1,105.
• Parts: $75,000.
• Cost per Engine: $76,105.

Replace the EEC software

• 3 work-hours × $85 per hour = $255 per engine.

FMI: AD