AD 80-02-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Lycoming Engines | TO-360-C1A6D | AVCO LYCOMING Model TO-360-C1A6D Series Engines |
Unsafe Condition
Failure of turbocharger oil drain flange P/N LW-14391 leading to possible loss of engine oil.
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Required Actions
Replace the turbocharger oil drain flange with P/N LW-16036 in accordance with AVCO Lycoming Service Bulletin No. 426 or FAA-approved equivalent. Equivalent methods of compliance must be approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.
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Compliance Time
within the next 50 hours in service after the effective date of this AD, unless already accomplished
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Affected Aircraft
AVCO Lycoming Model TO-360-C1A6D series engines serial numbers L-101-69A through L-264-69A except L-200-69A, L-246-69A and L-254-69A and all engines overhauled by Lycoming prior to May 4, 1977.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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