Time Limits / Maintenance Checks — Airworthiness Limitations Section — Amendment
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AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of GE CT7-8A turboshaft engines must revise the Airworthiness Limitations Section of their engine maintenance manuals and approved maintenance or inspection programs within 90 days of October 7, 2022. The revised life limits must be incorporated as specified, and no alternative life limits may be used thereafter. Requests for alternative methods of compliance must be submitted to the FAA for approval.
Summary
The Federal Aviation Administration's Airworthiness Directive 2022-18-16 is a final rule addressing all General Electric Company CT7-8A model turboshaft engines. It mandates revisions to the Airworthiness Limitations Section of the engine maintenance manual and operators' maintenance programs to incorporate reduced life limits for specific turbine parts. This directive aims to enhance safety by preventing potential engine and helicopter damage.
What changed
This AD introduces reduced life limits for the stage 1 turbine aft cooling plates, stage 2 turbine forward cooling plates, turbine interstage seals, and stage 4 turbine disks on GE CT7-8A turboshaft engines. Operators must revise their maintenance manuals and approved programs to reflect these new, lower life limits. No alternative life limits will be approved after compliance.
Why it matters
The reduced life limits address an unsafe condition that could lead to uncontained part release and possible loss of helicopter control. Aviation professionals must update maintenance practices to ensure continued airworthiness and compliance with FAA regulations. This helps mitigate risks associated with turbine part failures and enhances overall flight safety.
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