AD 2025-01-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | CFM | International | Airworthiness Directives; CFM International, S.A. Engines |
Unsafe Condition
The aft arm of the high-pressure turbine (HPT) rotor interstage seal had failed due to a non-conforming surface condition in the fillet area coupled with higher-than-expected operating stress due to friction.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the affected HPT rotor interstage seal from service and replace with a part eligible for installation. For LEAP-1A engines, this must be done at the next engine shop visit or before exceeding the applicable cyclic threshold, whichever occurs first after the effective date of this AD.
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Compliance Time
Within the compliance times specified, unless already done.
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Affected Aircraft
CFM International, S.A. Model LEAP-1A23, LEAP-1A24, LEAP-1A24E1, LEAP-1A26, LEAP-1A26CJ, LEAP-1A26E1, LEAP-1A29, LEAP-1A29CJ, LEAP-1A30, LEAP-1A32, LEAP-1A33, LEAP-1A33B2, and LEAP-1A35A engines, and Model LEAP-1C28, LEAP-1C30, and LEAP-1C30B1 engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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