AD 88-03-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Continental Motors | GTSIO-520-C | TELEDYNE CONTINENTAL MOTORS (TCM) Model IO-360, TSIO-360, O-470, IO-470, TSIO-470, IO-520, TSIO-520, GTSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | GTSIO-520-D | TELEDYNE CONTINENTAL MOTORS (TCM) Model IO-360, TSIO-360, O-470, IO-470, TSIO-470, IO-520, TSIO-520, GTSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | GTSIO-520-E | TELEDYNE CONTINENTAL MOTORS (TCM) Model IO-360, TSIO-360, O-470, IO-470, TSIO-470, IO-520, TSIO-520, GTSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | GTSIO-520-F | TELEDYNE CONTINENTAL MOTORS (TCM) Model IO-360, TSIO-360, O-470, IO-470, TSIO-470, IO-520, TSIO-520, GTSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | GTSIO-520-H | TELEDYNE CONTINENTAL MOTORS (TCM) Model IO-360, TSIO-360, O-470, IO-470, TSIO-470, IO-520, TSIO-520, GTSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | GTSIO-520-K | TELEDYNE CONTINENTAL MOTORS (TCM) Model IO-360, TSIO-360, O-470, IO-470, TSIO-470, IO-520, TSIO-520, GTSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | GTSIO-520-L | TELEDYNE CONTINENTAL MOTORS (TCM) Model IO-360, TSIO-360, O-470, IO-470, TSIO-470, IO-520, TSIO-520, GTSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | GTSIO-520-M | TELEDYNE CONTINENTAL MOTORS (TCM) Model IO-360, TSIO-360, O-470, IO-470, TSIO-470, IO-520, TSIO-520, GTSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | GTSIO-520-N | TELEDYNE CONTINENTAL MOTORS (TCM) Model IO-360, TSIO-360, O-470, IO-470, TSIO-470, IO-520, TSIO-520, GTSIO-520, and IO-550 Series Engines |
| engine | Continental Motors | IO-360-A | TELEDYNE CONTINENTAL MOTORS (TCM) Model IO-360, TSIO-360, O-470, IO-470, TSIO-470, IO-520, TSIO-520, GTSIO-520, and IO-550 Series Engines |
Unsafe Condition
Possible loss of engine oil and subsequent engine failure due to the installation of oil filters TCM P/N 649309 or 649310.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Determine if oil filter TCM P/N 649309 or 649310 is installed. Replace P/N 649309 with P/N 649923 or equivalent PMA product. Replace P/N 649310 with P/N 649922 or equivalent PMA product. Make log book entry showing compliance. Ferrying allowed under FAR 21.197 and 21.199. Equivalent compliance may be approved by Atlanta Aircraft Certification Office. Compliance time may be adjusted with substantiating data through FAA inspector.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Next oil change or within 10 flight hours, whichever occurs first, unless already accomplished.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
TELEDYNE CONTINENTAL MOTORS (TCM) Model IO-360, TSIO-360, O-470, IO-470, TSIO-470, IO-520, TSIO-520, GTSIO-520, and IO-550 series engines equipped with oil filters.
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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