AD 59-10-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Lycoming Engines | GO-480-A1A | LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines |
| engine | Lycoming Engines | GO-480-B | LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines |
| engine | Lycoming Engines | GO-480-B1A6 | LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines |
| engine | Lycoming Engines | GO-480-B1B | LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines |
| engine | Lycoming Engines | GO-480-B1C | LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines |
| engine | Lycoming Engines | GO-480-B1D | LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines |
| engine | Lycoming Engines | GO-480-C1B6 | LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines |
| engine | Lycoming Engines | GO-480-C1D6 | LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines |
| engine | Lycoming Engines | GO-480-C2C6 | LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines |
| engine | Lycoming Engines | GO-480-C2D6 | LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines |
Unsafe Condition
Cylinder baffle clamps can become wedged between the cylinders causing barrel distortion and possible extensive damage to the cylinder bore and piston assembly due to normal expansion during engine operation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove and replace cylinder baffle clamps with baffle retainers and retainer hooks, or remove and rework clamps to provide more clearance between the lower portion of the clamp and the cylinder.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
as soon as possible but not later than July 1, 1959
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Affected Aircraft
LYCOMING Model O-320, O-340, O-360, GO-480, GSO-480, IGSO-480 and O-540 Series Engines as noted.
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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