AD 89-14-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Continental Motors | TSIO-520-BE | TELEDYNE CONTINENTAL MOTORS (TCM) Model TSIO-520BE Engines |
Unsafe Condition
Crankshaft end play loss, improper thru-bolt torque, or bearing shift/mismatch could lead to engine power loss or failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect crankshaft end play every 25 hours time-in-service, check thru-bolt torque before further flight, and visually inspect number two crankcase main bearing every 200 hours time-in-service. Engines must be removed from service if no end play, propeller rotation force outside limits, or bearing issues detected.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to further flight and at intervals not to exceed 25 hours time-in-service (end play check), 200 hours time-in-service (bearing inspection), with initial compliance before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Teledyne Continental Motors Model TSIO-520BE engines, serial numbers 528001 through 528337, except those exempted by prior AD 87-26-08 compliance.
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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