AD 2000-21-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | CFE | Company CFE738-1-1B Turbofan | Airworthiness Directives; CFE Company CFE738-1-1B Turbofan Engines |
Unsafe Condition
Loss of seal retention that results in contact between the seal face and the stage 2 high pressure turbine (HPT) rotor disk, leading to wear and subsequent separation of the stage 2 HPT wheel rim, and an uncontained failure of the stage 2 HPT rotor.
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Required Actions
Remove support assemblies with part numbers 3050860-2, -3, and -5 through -9, and replace them with new support assemblies (P/N 3050860-10, -11, P/N 3057005-1 through -5, or P/N 3057006-1, -2) in accordance with ASB CFE738-A72-8042, Revision 1. Break-in of the support assembly seal must be done per SB CFE738-72-8043, Revision 1. For engines not previously borescope inspected, either replace the support assembly or perform a borescope inspection per ASB CFE738-A72-8041.
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Compliance Time
Within the specified replacement interval for engines not previously borescope inspected; otherwise, compliance is required as indicated.
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Affected Aircraft
CFE Company CFE738-1-1B turbofan engines with support assemblies, part numbers 3050860-2, -3, and -5 through -9, installed. These engines are installed on, but not limited to, Dassault Aviation Falcon 2000 series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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