AD Amdt-39-10286
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | CFM | International CFM56-5B/2P Series | Airworthiness Directives; CFM International CFM56-5B/2P Series Turbofan Engines |
Unsafe Condition
A low cycle fatigue (LCF) failure of the low pressure turbine (LPT) case due to minimum calculated LCF lives significantly lower than the published retirement life.
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Required Actions
Reduce the low cycle fatigue (LCF) retirement life for certain low pressure turbine (LPT) cases. Operators must comply with the revised life limits specified in the engine manufacturer's instructions.
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Compliance Time
Before further flight
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Affected Aircraft
CFM International CFM56-5B/2P series turbofan engines with certain low pressure turbine (LPT) cases affected by the refined life analysis.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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