AD Amdt-39-11079
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | CFM | International CFM56-5 Series | Airworthiness Directives; CFM International CFM56-5 Series Turbofan Engines |
Unsafe Condition
Low cycle fatigue (LCF) failure of the high pressure turbine rotor (HPTR) front air seals, which could lead to an uncontained engine failure and damage to the aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Revise the maintenance program to reduce the LCF retirement lives for affected HPTR front air seals. Implement a drawdown schedule for parts with reduced LCF retirement lives.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
CFM International CFM56-5 series turbofan engines, as specified in the AD.
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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