Engine - 3rd-Stage Compressor Wheels - Replacement
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AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of aircraft with affected Rolls-Royce AE 3007 series engines must replace the identified 3rd-stage compressor wheels before they exceed the specified cycle limits. The AD is effective August 14, 2020, and compliance must be achieved promptly to mitigate the risk of engine failure. Stakeholders should review Rolls-Royce Alert Service Bulletin AE 3007A-A-72-446 Revision 2 for detailed replacement procedures and coordinate with the FAA for any questions.
Summary
Federal Aviation Administration Airworthiness Directive 2020-16-13 is a final rule addressing certain Rolls-Royce Corporation AE 3007 series turbofan engines installed on aircraft such as the Embraer ERJ-145. This directive mandates the replacement of specific 3rd-stage compressor wheels due to identified cracks that could lead to engine failure. The AD aims to prevent uncontained engine failures and ensure continued airworthiness of affected engines.
What changed
This new airworthiness directive introduces mandatory replacement of affected 3rd-stage compressor wheels on Rolls-Royce AE 3007A, AE 3007A1, AE 3007A1/1, AE 3007A1/2, AE 3007A1/3, AE 3007A1E, AE 3007A1P, and AE 3007A3 turbofan engines. It requires removal of compressor wheels from service before exceeding specified cycle limits due to low-cycle fatigue cracks caused by manufacturing processes. The AD is issued without prior notice and comment due to the urgent safety risk.
Why it matters
This AD is critical for aviation professionals because it addresses a safety risk that could cause uncommanded in-flight engine shutdowns and potential uncontained engine failures. Operators and maintenance organizations must comply to avoid engine damage and ensure passenger safety. Compliance with this directive helps prevent costly incidents and maintains regulatory compliance for affected aircraft fleets.
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