AD 73-15-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Lycoming Engines | HIO-360-D1A | AVCO LYCOMING Model HIO-360-D1A Engines |
Unsafe Condition
Failure of Bendix part numbers 10-349235-3 and 10-349235-4 magnetos due to degraded rubber drive plate grommet (part number 10-391315).
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Required Actions
Replace the part number 10-391315 rubber drive plate grommet in accordance with Lycoming Service Bulletin No. 364 or equivalent procedure approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region.
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Compliance Time
within 300 hours time in service after the effective date of this AD and every 300 hours in service thereafter
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Affected Aircraft
AVCO Lycoming Model HIO-360-D1A engines installed on Hughes Models 269C and 300C helicopters.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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