AD 75-04-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Regal Air, Inc. | 305A | Airworthiness Directives; CESSNA Model 305A Series Airplanes |
Unsafe Condition
Failure of the aluminum elbow fitting, part number X34352, could occur due to corrosion or fatigue, leading to oil line system failure.
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Required Actions
Remove the aluminum elbow fitting P/N X34352 from the oil cooler and replace it with a brass fabricated fitting of the same part number, Weatherhead P/N C5405X10X6, or an equivalent part approved by the FAA. Follow proper flex line installation procedures as outlined in AC 43.13-1A, Chapter 10.
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Compliance Time
within the next twenty-five hours' time in service after the effective date of this AD, unless already accomplished
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Affected Aircraft
Cessna Model 305A series airplanes modified with STC SA568SW or SA504SW (oil line rerouting), including those listed in Note 3 of Aircraft Specification 5A5.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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