AD 81-24-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | TFE731-2 | GARRETT TURBINE ENGINE COMPANY Model TFE 731-2, -3, -3R, -3A and -3B Engines |
| engine | Honeywell International Inc. | TFE731-3 | GARRETT TURBINE ENGINE COMPANY Model TFE 731-2, -3, -3R, -3A and -3B Engines |
| engine | Honeywell International Inc. | TFE731-3A | GARRETT TURBINE ENGINE COMPANY Model TFE 731-2, -3, -3R, -3A and -3B Engines |
| engine | Honeywell International Inc. | TFE731-3B | GARRETT TURBINE ENGINE COMPANY Model TFE 731-2, -3, -3R, -3A and -3B Engines |
| engine | Honeywell International Inc. | TFE731-3R | GARRETT TURBINE ENGINE COMPANY Model TFE 731-2, -3, -3R, -3A and -3B Engines |
Unsafe Condition
Separation of the engine rear mount from the turbine interstage transition duct due to improper weld penetration in the engine mount clevises.
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Required Actions
Determine if the engine is listed in Garrett Service Bulletin TFE 731-72-3159. Inspect duct part number and serial number. Replace, x-ray inspect, proof load inspect, or modify duct with an aft mount auxiliary bracket as required. Reidentify duct part numbers based on inspection results.
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Compliance Time
Prior to the accumulation of 350 hours additional time in service from the effective date of this AD (January 6, 1982).
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Affected Aircraft
Honeywell International Inc. TFE731-2, TFE731-3, TFE731-3A, TFE731-3B, TFE731-3R engines with turbine interstage transition ducts Part No. 3071486-3, -4, -5, -6, or 3072318-1.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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