AD 2002-12-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell | International Inc | Airworthiness Directives; Honeywell International Inc. (Formerly AlliedSignal Inc. and Garrett Turbine Engine Company) TPE331-11U, -12B, -12JR, -12UA, -12UAR, and -12UHR Series Turboprop Engines |
| engine | Garrett | Turbine | Airworthiness Directives; Honeywell International Inc. (Formerly AlliedSignal Inc. and Garrett Turbine Engine Company) TPE331-11U, -12B, -12JR, -12UA, -12UAR, and -12UHR Series Turboprop Engines |
Unsafe Condition
Reports of spur gearshaft (bull gear) rim separations and high-speed pinion (HSP) assembly failures.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct repetitive Spectrometric Oil Analysis Program (SOAP) sampling, assess SOAP trends, and perform inspections and replacement of certain gearbox components.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Not specified in the provided text.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Honeywell International Inc. (formerly AlliedSignal Inc. and Garrett Turbine Engine Company) TPE331-11U, -12B, -12JR, -12UA, -12UAR, and -12UHR series turboprop engines.
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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