AD 88-18-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | TFE731-3 | GARRETT ENGINE DIVISION, ALLIED-SIGNAL, INC. Model TFE731-3 Engine |
| engine | Honeywell International Inc. | TFE731-3A | GARRETT ENGINE DIVISION, ALLIED-SIGNAL, INC. Model TFE731-3 Engine |
| engine | Honeywell International Inc. | TFE731-3AR | GARRETT ENGINE DIVISION, ALLIED-SIGNAL, INC. Model TFE731-3 Engine |
| engine | Honeywell International Inc. | TFE731-3R | GARRETT ENGINE DIVISION, ALLIED-SIGNAL, INC. Model TFE731-3 Engine |
Unsafe Condition
Failure of the high pressure turbine rotor (HPTR) disc could result in uncontained engine failures.
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Required Actions
Review engine maintenance records to determine if specified HPTR discs with certain part and serial numbers are installed. Inspect and remove suspect discs from service and replace with serviceable ones per Garrett Alert Service Bulletin TFE731-A72-3376. Ensure inspections are completed before further flight if suspect discs are found in spare engines or parts.
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Compliance Time
within 25 cycles in service after the effective date of this AD
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Affected Aircraft
Garrett Engine Division, Allied-Signal, Inc. TFE731-3 engine models installed in specific airplane models including Falcon 50, JetStar, Westwind, Learjet 55, BAe HS125-Series, and others as listed in the AD.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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