AD 86-03-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | TFE731-2 | GARRETT TURBINE ENGINE COMPANY Model TFE731-2, -3, -3A, -3AR, -3B, -3BR, and - 3R Engines |
| engine | Honeywell International Inc. | TFE731-3 | GARRETT TURBINE ENGINE COMPANY Model TFE731-2, -3, -3A, -3AR, -3B, -3BR, and - 3R Engines |
| engine | Honeywell International Inc. | TFE731-3A | GARRETT TURBINE ENGINE COMPANY Model TFE731-2, -3, -3A, -3AR, -3B, -3BR, and - 3R Engines |
| engine | Honeywell International Inc. | TFE731-3AR | GARRETT TURBINE ENGINE COMPANY Model TFE731-2, -3, -3A, -3AR, -3B, -3BR, and - 3R Engines |
| engine | Honeywell International Inc. | TFE731-3B | GARRETT TURBINE ENGINE COMPANY Model TFE731-2, -3, -3A, -3AR, -3B, -3BR, and - 3R Engines |
| engine | Honeywell International Inc. | TFE731-3BR | GARRETT TURBINE ENGINE COMPANY Model TFE731-2, -3, -3A, -3AR, -3B, -3BR, and - 3R Engines |
| engine | Honeywell International Inc. | TFE731-3R | GARRETT TURBINE ENGINE COMPANY Model TFE731-2, -3, -3A, -3AR, -3B, -3BR, and - 3R Engines |
Unsafe Condition
Separation of the engine rear mount from the duct due to inadequate weld penetration in turbine interstage transition ducts with part numbers 3071486-3 through -10, 3072318-1 and -3, 3072726-1 and -2.
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Required Actions
Determine if the duct serial number is in Table 1 or 2 of Garrett SB TFE731-72-3309, Revision 1. Replace or modify ducts listed in Table 1, and either X-ray inspect or replace/modify ducts listed in Table 2. Incorporate the aft mount auxiliary bracket as terminating action if installed.
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Compliance Time
prior to the accumulation of 1,150 hours time in service from the effective date of this AD
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Affected Aircraft
GARRETT TURBINE ENGINE COMPANY Model TFE731-2, -3, -3A, -3AR, -3B, -3BR, and -3R engines with turbine interstage transition ducts part numbers 3071486-3 through -10, 3072318-1 and -3, 3072726-1 and -2, identified by individual serial numbers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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