AD 84-10-06 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | TPE331-1 | GARRETT TURBINE ENGINE COMPANY Model TPE331-25, -43, -47, -55, -1, -2, -3, -5, -6, -10 (except -10A), and -11 Engines |
| engine | Honeywell International Inc. | TPE331-10 | GARRETT TURBINE ENGINE COMPANY Model TPE331-25, -43, -47, -55, -1, -2, -3, -5, -6, -10 (except -10A), and -11 Engines |
| engine | Honeywell International Inc. | TPE331-10B | GARRETT TURBINE ENGINE COMPANY Model TPE331-25, -43, -47, -55, -1, -2, -3, -5, -6, -10 (except -10A), and -11 Engines |
| engine | Honeywell International Inc. | TPE331-10G | GARRETT TURBINE ENGINE COMPANY Model TPE331-25, -43, -47, -55, -1, -2, -3, -5, -6, -10 (except -10A), and -11 Engines |
| engine | Honeywell International Inc. | TPE331-10GR | GARRETT TURBINE ENGINE COMPANY Model TPE331-25, -43, -47, -55, -1, -2, -3, -5, -6, -10 (except -10A), and -11 Engines |
| engine | Honeywell International Inc. | TPE331-10R | GARRETT TURBINE ENGINE COMPANY Model TPE331-25, -43, -47, -55, -1, -2, -3, -5, -6, -10 (except -10A), and -11 Engines |
| engine | Honeywell International Inc. | TPE331-10U | GARRETT TURBINE ENGINE COMPANY Model TPE331-25, -43, -47, -55, -1, -2, -3, -5, -6, -10 (except -10A), and -11 Engines |
| engine | Honeywell International Inc. | TPE331-10UA | GARRETT TURBINE ENGINE COMPANY Model TPE331-25, -43, -47, -55, -1, -2, -3, -5, -6, -10 (except -10A), and -11 Engines |
| engine | Honeywell International Inc. | TPE331-10UF | GARRETT TURBINE ENGINE COMPANY Model TPE331-25, -43, -47, -55, -1, -2, -3, -5, -6, -10 (except -10A), and -11 Engines |
| engine | Honeywell International Inc. | TPE331-10UG | GARRETT TURBINE ENGINE COMPANY Model TPE331-25, -43, -47, -55, -1, -2, -3, -5, -6, -10 (except -10A), and -11 Engines |
Unsafe Condition
Possible engine failure due to unsatisfactory running torque of the fuel control/pump assembly drive shaft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the fuel control/pump assembly drive shaft running torque per GTEC SB TPE331-73-0121, Revision 2 or equivalent. Remove from service fuel pump assemblies with unsatisfactory results unless modified. Reassemble to approved configuration upon disassembly. Allow ferry permits and alternative compliance with FAA approval.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Inspect not later than the next 100 hours in service if fuel pump assembly time since new/last assembled or engine total time since new/overhauled is less than 200 hours; next 200 hours in service if between 200 and 1,000 hours; or next fuel pump disassembly if 1,000 hours or more.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
GARRETT TURBINE ENGINE COMPANY models TPE331-25, -43, -47, -55, -1, -2, -3, -5, -6, -10 (except -10A), and -11 engines equipped with specified fuel pump assemblies (P/N/SN combinations listed in the AD).
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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