AD 93-15-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | TPE331-1 | ALLIED-SIGNAL INC., GARRETT ENGINE DIVISION Model TPE331-47A, -55B, and -61A and TPE331-1, -2, -3, -5, -6, -8, -10, -11, -12, -14A, -14B, -15AW, -25, and -43 Series Engines |
| engine | Honeywell International Inc. | TPE331-10 | ALLIED-SIGNAL INC., GARRETT ENGINE DIVISION Model TPE331-47A, -55B, and -61A and TPE331-1, -2, -3, -5, -6, -8, -10, -11, -12, -14A, -14B, -15AW, -25, and -43 Series Engines |
| engine | Honeywell International Inc. | TPE331-10A | ALLIED-SIGNAL INC., GARRETT ENGINE DIVISION Model TPE331-47A, -55B, and -61A and TPE331-1, -2, -3, -5, -6, -8, -10, -11, -12, -14A, -14B, -15AW, -25, and -43 Series Engines |
| engine | Honeywell International Inc. | TPE331-10B | ALLIED-SIGNAL INC., GARRETT ENGINE DIVISION Model TPE331-47A, -55B, and -61A and TPE331-1, -2, -3, -5, -6, -8, -10, -11, -12, -14A, -14B, -15AW, -25, and -43 Series Engines |
| engine | Honeywell International Inc. | TPE331-10G | ALLIED-SIGNAL INC., GARRETT ENGINE DIVISION Model TPE331-47A, -55B, and -61A and TPE331-1, -2, -3, -5, -6, -8, -10, -11, -12, -14A, -14B, -15AW, -25, and -43 Series Engines |
| engine | Honeywell International Inc. | TPE331-10GR | ALLIED-SIGNAL INC., GARRETT ENGINE DIVISION Model TPE331-47A, -55B, and -61A and TPE331-1, -2, -3, -5, -6, -8, -10, -11, -12, -14A, -14B, -15AW, -25, and -43 Series Engines |
| engine | Honeywell International Inc. | TPE331-10J | ALLIED-SIGNAL INC., GARRETT ENGINE DIVISION Model TPE331-47A, -55B, and -61A and TPE331-1, -2, -3, -5, -6, -8, -10, -11, -12, -14A, -14B, -15AW, -25, and -43 Series Engines |
| engine | Honeywell International Inc. | TPE331-10N | ALLIED-SIGNAL INC., GARRETT ENGINE DIVISION Model TPE331-47A, -55B, and -61A and TPE331-1, -2, -3, -5, -6, -8, -10, -11, -12, -14A, -14B, -15AW, -25, and -43 Series Engines |
| engine | Honeywell International Inc. | TPE331-10R | ALLIED-SIGNAL INC., GARRETT ENGINE DIVISION Model TPE331-47A, -55B, and -61A and TPE331-1, -2, -3, -5, -6, -8, -10, -11, -12, -14A, -14B, -15AW, -25, and -43 Series Engines |
| engine | Honeywell International Inc. | TPE331-10U | ALLIED-SIGNAL INC., GARRETT ENGINE DIVISION Model TPE331-47A, -55B, and -61A and TPE331-1, -2, -3, -5, -6, -8, -10, -11, -12, -14A, -14B, -15AW, -25, and -43 Series Engines |
Unsafe Condition
Sudden loss of propeller control during application of thrust reverse that may cause asymmetric thrust and loss of aircraft control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect PPC gaskets in accordance with specified service bulletins to determine if they incorporate internal metal reinforcement. Replace unreinforced gaskets with serviceable metal reinforced gaskets prior to further flight.
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Compliance Time
Within the next 10 hours time in service (TIS) after the effective date of this AD
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Affected Aircraft
Allied-Signal Inc., Garrett Engine Division Model TPE331-47A, -55B, -61A, -1, -2, -3, -5, -6, -8, -10, -11, -12, -14A, -14B, -15AW, -25, and -43 series turboprop engines installed on various aircraft models including Mitsubishi MU-2B, CASA C-212, BAe Jetstream, Fairchild SA226/SA227, Prop-Jets 400, Cessna 441, Twin Commander 680/690/695, Shorts SC7, Dornier 228, Beech 18/45, Pilatus PC-6, Piper PA-42-1000, De Havilland DH 104, Grumman TS-2A/G-164C, and Schweitzer G-164.
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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