EASA AD US-2023-17-08
Engine - Stages 6—10 Compressor Rotor Spools and Forward Seals - Replacement
Summary
FAA Airworthiness Directive 2023-17-08 is a final rule addressing certain General Electric Company GEnx-1B and GEnx-2B engines. It mandates the replacement of stages 6-10 compressor rotor spools and forward seals manufactured from powder metal material suspected to contain iron inclusion. This directive aims to mitigate the risk of reduced material properties and fatigue life in these engine components.
What Changed
This new airworthiness directive introduces mandatory removal and replacement of affected stages 6-10 compressor rotor spools and forward seals identified by specific part and serial numbers in GE service bulletins. It clarifies compliance thresholds based on the current thrust rating at the time of the AD issuance and updates service bulletin references to include revision levels. The AD applies to multiple GEnx-1B and GEnx-2B engine models and is effective October 23, 2023.
Why It Matters
This AD is critical for aviation professionals because it addresses a safety risk caused by manufacturing defects that could lead to premature failure of compressor components. Operators and maintenance organizations must ensure timely compliance to avoid unsafe engine operation and potential in-flight issues. Understanding the affected parts and compliance requirements helps maintain airworthiness and regulatory adherence.
What To Do
Operators of affected GE GEnx-1B and GEnx-2B engines must inspect installed stages 6-10 compressor rotor spools and forward seals against the specified part and serial numbers. If affected parts are found, they must be replaced with eligible parts by the next piece-part exposure or no later than the cyclic thresholds listed in the referenced GE service bulletins. Compliance with this AD is mandatory by October 23, 2023.
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