AD 93-08-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Continental Motors | IO-470-A | TELEDYNE CONTINENTAL MOTORS (TCM) Model O-470, IO-470, IO-520, TSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | IO-470-C | TELEDYNE CONTINENTAL MOTORS (TCM) Model O-470, IO-470, IO-520, TSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | IO-470-D | TELEDYNE CONTINENTAL MOTORS (TCM) Model O-470, IO-470, IO-520, TSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | IO-470-E | TELEDYNE CONTINENTAL MOTORS (TCM) Model O-470, IO-470, IO-520, TSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | IO-470-F | TELEDYNE CONTINENTAL MOTORS (TCM) Model O-470, IO-470, IO-520, TSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | IO-470-G | TELEDYNE CONTINENTAL MOTORS (TCM) Model O-470, IO-470, IO-520, TSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | IO-470-H | TELEDYNE CONTINENTAL MOTORS (TCM) Model O-470, IO-470, IO-520, TSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | IO-470-J | TELEDYNE CONTINENTAL MOTORS (TCM) Model O-470, IO-470, IO-520, TSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | IO-470-K | TELEDYNE CONTINENTAL MOTORS (TCM) Model O-470, IO-470, IO-520, TSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | IO-470-L | TELEDYNE CONTINENTAL MOTORS (TCM) Model O-470, IO-470, IO-520, TSIO-520, and IO-550 Series Engines |
Unsafe Condition
Incorrect oil pick-up tube installation could cause engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect engines for an incorrect oil pick-up tube within 50 hours time in service after the effective date. If found, remove the oil pick-up tube and oil sump, and replace with serviceable parts before further flight.
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Compliance Time
within the next 50 hours time in service after the effective date of this AD
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Affected Aircraft
Teledyne Continental Motors (TCM) rebuilt and overhauled Model O-470, IO-470, IO-520, TSIO-520, and IO-550 series engines listed by serial number in TCM Service Bulletin No. M91-10, Revision 1, installed on but not limited to Cessna, Piper, and Beechcraft aircraft.
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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