AD 63-15-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Continental Motors | E165-2 | CONTINENTAL Models E165, E185, E225, and O-470 Series Engines |
| engine | Continental Motors | E165-3 | CONTINENTAL Models E165, E185, E225, and O-470 Series Engines |
| engine | Continental Motors | E165-4 | CONTINENTAL Models E165, E185, E225, and O-470 Series Engines |
| engine | Continental Motors | E185-1 | CONTINENTAL Models E165, E185, E225, and O-470 Series Engines |
| engine | Continental Motors | E185-10 | CONTINENTAL Models E165, E185, E225, and O-470 Series Engines |
| engine | Continental Motors | E185-11 | CONTINENTAL Models E165, E185, E225, and O-470 Series Engines |
| engine | Continental Motors | E185-2 | CONTINENTAL Models E165, E185, E225, and O-470 Series Engines |
| engine | Continental Motors | E185-3 | CONTINENTAL Models E165, E185, E225, and O-470 Series Engines |
| engine | Continental Motors | E185-5 | CONTINENTAL Models E165, E185, E225, and O-470 Series Engines |
| engine | Continental Motors | E185-8 | CONTINENTAL Models E165, E185, E225, and O-470 Series Engines |
Unsafe Condition
Exhaust valves with part numbers 40651, 537844, 538997, or 539449 may fail due to improper material composition or manufacturing defects, leading to engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove all exhaust valves with specified part numbers and replace them with part number 626540. Compliance must be completed at the next engine top overhaul or overhaul, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
next engine top overhaul, or overhaul, which occurs first
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Continental Motors E165, E185, E225, and O-470 Series Engines, as listed in the AD, installed in aircraft such as Beech 35 Series, Cessna 180, 182, 310, and Navion.
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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