Airworthiness DirectiveEASA AD US-2021-19-10

Engine - Stage 1/2 High Pressure Turbine Disks - Removal

Published: Sep 13, 2021
Effective: Sep 27, 2021
Deadline: Sep 27, 2021

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What to do

Operators of aircraft equipped with the affected IAE PW1122G-JM through PW1133G-JM engines must identify and remove the specified high-pressure turbine first-stage and second-stage disks from service within 30 days of September 27, 2021. Maintenance and inspection schedules should be updated accordingly to ensure compliance. Comments on the AD can be submitted to the FAA by October 25, 2021.

Summary

The Federal Aviation Administration (FAA) Airworthiness Directive 2021-19-10 addresses certain International Aero Engines, LLC PW1122G-JM, PW1124G1-JM, PW1124G-JM, PW1127G1-JM, PW1127GA-JM, PW1127G-JM, PW1129G-JM, PW1130G-JM, PW1133GA-JM, and PW1133G-JM turbofan engines. This directive follows an uncontained failure of a high-pressure turbine disk on an Airbus A321-231 powered by IAE V2533-A5 engines, prompting removal of specific first and second stage high-pressure turbine disks. The AD aims to mitigate the risk of similar failures and enhance engine safety.

What changed

This new airworthiness directive requires the removal from service of certain high-pressure turbine first-stage and second-stage disks installed on the specified IAE PW1122G-JM through PW1133G-JM engine models. It expands the scope of previous emergency AD 2020-07-51 by identifying additional affected disk populations beyond the V2533-A5 engines. The directive mandates compliance within 30 days of the effective date to prevent uncontained disk failures.

Why it matters

This AD is critical for aviation professionals as it addresses a severe safety risk involving uncontained turbine disk failures that can cause high-energy debris release, potentially damaging the engine, aircraft, and risking loss of the airplane. Operators, maintenance organizations, and compliance teams must act promptly to ensure affected disks are removed to maintain airworthiness and passenger safety. Failure to comply could result in catastrophic engine damage and operational disruptions.

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