AD 2007-03-15
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | CFM | International CFM56-5 and -5B Series | Airworthiness Directives; CFM International CFM56-5 and -5B Series Turbofan Engines |
Unsafe Condition
Unexpected deterioration of critical rotating engine parts due to higher than desired engine operating EGTs.
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Required Actions
Replace exhaust gas temperature (EGT) harnesses and EGT couplings as necessary. Establish an EGT baseline and trend monitoring. Inspect for slow and continuous EGT drift downward.
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Compliance Time
Within 50 flight hours after the effective date.
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Affected Aircraft
CFM International CFM56-5 and -5B series turbofan engines, including subsequently certified engine models with affected EGT harnesses installed.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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