AD Amdt-39-9989
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | CFM | International CFM56-3 | Airworthiness Directives; CFM International CFM56-3, -3B, and -3C Series Turbofan Engines |
Unsafe Condition
A low cycle fatigue (LCF) failure of the fan disk due to minimum calculated LCF lives significantly lower than published retirement lives.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Reduce the low cycle fatigue (LCF) retirement lives for certain fan disks. Implement the revised LCF retirement lives as specified in the manufacturer's service bulletin.
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 CFM56-3, -3B, and -3C series turbofan 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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