AD 2021-09-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Austro | Engine GmbH | Airworthiness Directives; Austro Engine GmbH Engines |
Unsafe Condition
Occurrences were reported of oil pump blockage on E4-A and E4-B engines. Subsequent investigation determined that the blockage was caused by oil contamination with casting sand from the production process of oil pump P/N E4A-50-000-BHY. A blocked oil pump causes failure of the engine lubrication system.
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Required Actions
This AD requires removing the affected oil pump from service and replacing it with a part eligible for installation. This AD also requires replacing the oil filter and engine oil.
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Compliance Time
Within 30 days, before accumulating 10 flight hours, or during the next scheduled maintenance, whichever occurs first after the effective date of this AD.
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Affected Aircraft
All Austro Engine GmbH E4 and E4P model diesel piston engines where the affected part is eligible for installation.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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