EASA AD US-2021-11-15
SUPERSEDED BY FAA AD 2022-02-09
Summary
FAA Airworthiness Directive 2021-11-15 is a final rule addressing certain International Aero Engines AG V2500 model turbofan engines installed on aircraft such as the Airbus A321-231. It mandates ultrasonic inspections of the high-pressure turbine (HPT) 1st-stage and 2nd-stage disks due to an uncontained failure event that caused high-energy debris to penetrate the engine cowling. The directive aims to ensure continued airworthiness and safety of these engines.
What Changed
This AD introduces mandatory ultrasonic inspections of the HPT 1st-stage and 2nd-stage disks on specified IAE V2500 engine models. Depending on inspection results, it requires replacement of affected disks to mitigate the risk of uncontained failures. It also clarifies inspection intervals, piece-part inspection requirements, and defines eligibility criteria for parts installation.
Why It Matters
This AD is critical for aviation professionals because it addresses a severe safety risk from uncontained turbine disk failures that could lead to engine damage or aborted takeoffs. Operators and maintenance organizations must comply to prevent potential in-flight engine failures and ensure regulatory compliance. Understanding the inspection and replacement requirements helps optimize maintenance planning and avoid unexpected operational disruptions.
What To Do
Affected operators must perform ultrasonic inspections of the HPT 1st-stage and 2nd-stage disks by July 13, 2021. If any disk fails inspection, it must be removed from service and replaced before further flight. Maintenance teams should also review the Airworthiness Limitations Section for additional inspection requirements and ensure only parts meeting the AD's eligibility criteria are installed.
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