AD Amdt-39-11497
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | CFE | Company Model CFE738-1-1B Turbofan | Airworthiness Directives; CFE Company Model CFE738-1-1B Turbofan Engines |
Unsafe Condition
Stage 2 high pressure turbine (HPT) aft cooling plates dented during assembly due to raised metal on the Stage 2 HPT disk post aft mating surface, which could lead to cooling plate failure and uncontained engine failure.
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Required Actions
Perform a one-time visual inspection of Stage 2 HPT aft cooling plates for nicks, dents, and scratches. If present, conduct a dimensional inspection of indentation depth. Repair indentations within acceptable limits or replace with serviceable parts. Inspect the Stage 2 HPT rotor disk post aft surface for raised metal and remove any raised metal found.
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Compliance Time
Before further flight
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Affected Aircraft
CFE Company Model CFE738-1-1B turbofan engines, identified by specific serial numbers.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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