AD 2012-17-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell | International Inc | Airworthiness Directives; Honeywell International Inc. Turbofan Engines |
Unsafe Condition
A rim/web separation of a first stage low-pressure turbine (LPT1) rotor assembly, which could lead to uncontained disk separation, engine failure, and damage to the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove affected LPT1 rotor assemblies and install assemblies eligible for installation. Compliance times vary based on engine installation context.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Varies based on engine installation context: within 2,600 hours or 8 years for engines in Falcon 20 and CASA 101 airplanes; within 5,100 hours or 8 years for other engines.
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Affected Aircraft
Honeywell International Inc. models TFE731-4, -4R, -5, -5R, -5AR, and -5BR series turbofan engines with specified LPT1 rotor assembly part numbers.
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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