AD 80-09-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Continental Motors | GTSIO-520-C | TELEDYNE CONTINENTAL MOTORS Model GTSIO-520 Series Engines |
| engine | Continental Motors | GTSIO-520-D | TELEDYNE CONTINENTAL MOTORS Model GTSIO-520 Series Engines |
| engine | Continental Motors | GTSIO-520-E | TELEDYNE CONTINENTAL MOTORS Model GTSIO-520 Series Engines |
| engine | Continental Motors | GTSIO-520-F | TELEDYNE CONTINENTAL MOTORS Model GTSIO-520 Series Engines |
| engine | Continental Motors | GTSIO-520-H | TELEDYNE CONTINENTAL MOTORS Model GTSIO-520 Series Engines |
| engine | Continental Motors | GTSIO-520-K | TELEDYNE CONTINENTAL MOTORS Model GTSIO-520 Series Engines |
| engine | Continental Motors | GTSIO-520-L | TELEDYNE CONTINENTAL MOTORS Model GTSIO-520 Series Engines |
| engine | Continental Motors | GTSIO-520-M | TELEDYNE CONTINENTAL MOTORS Model GTSIO-520 Series Engines |
| engine | Continental Motors | GTSIO-520-N | TELEDYNE CONTINENTAL MOTORS Model GTSIO-520 Series Engines |
Unsafe Condition
Separation of the starter torsional damper from the starter gear shaft and subsequent damage to critical components in the engine nacelle.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Prior to next flight, inspect the locking device at the outboard end of the starter gear shaft for proper installation of all required parts (snap ring, nut lock key, compression spring, Marsden slotted hex nut). If parts are incorrect or missing, check torque on the existing hexagon nut within 25 hours engine operating time and install correct parts within 100 hours engine operating time.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to next flight and within every 25 hours engine operating time thereafter until all correct parts are installed. Install all correct parts within 100 hours engine operating time after the effective date of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
TELEDYNE CONTINENTAL MOTORS Model GTSIO-520 series engines overhauled by AAR Western Skyways, Inc.
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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