Data / Federal rules / 2025-02204
Airworthiness Directives; CFM International, S.A. Engines
The Federal Aviation Administration published this final rule in the Federal Register on February 4, 2025. It took effect on March 11, 2025.
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What the agency says
The FAA is adopting a new airworthiness directive (AD) for certain CFM International, S.A. (CFM) Model LEAP-1A and LEAP-1C engines. This AD was prompted by an investigation of an in-flight shut down event that revealed the aft arm of the high-pressure turbine (HPT) rotor interstage seal had failed. This AD requires removal from service and replacement of the HPT rotor interstage seal for LEAP-1A engines. Since the HPT rotor interstage seal part number is interchangeable between LEAP-1A and LEAP-1C engines, this AD also prohibits installation of these affected parts onto any LEAP-1A or LEAP-1C engine. The FAA is issuing this AD to address the unsafe condition on these products.
Key facts
- Document number
- 2025-02204
- Type
- Final rule
- Action
- Final rule
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- February 4, 2025
- Takes effect
- March 11, 2025
- Dates
- This AD is effective March 11, 2025.
- Docket
- Docket No. FAA-2024-2325; Project Identifier AD-2024-00412-E; Amendment 39-22927; AD 2025-01-03
- Regulation ID (RIN)
- 2120-AA64
- Code of Federal Regulations
- 14 CFR 39
- Topics
- Air transportation; Aircraft; Aviation safety; Incorporation by reference; Safety
- Pages
- 3
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Everything from the Federal Aviation Administration · Rules on air transportation · Rules on aircraft · Rules on aviation safety · Published in February 2025
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