Airworthiness directives › 2021-09-04
AD 2021-09-04 Airworthiness Directives; Austro Engine GmbH Engines
Makes named: austro. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to all Austro Engine GmbH E4 and E4P model diesel piston engines.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within the compliance time specified in Table 1 to paragraph (g) of this AD: (1) Remove the oil pump, part number (P/N) E4A-50-000-BHY, from service and replace with a part eligible for installation using the Accomplishment/Instructions, paragraph 2.2.1 or paragraph 2.2.2, of Austro Engine GmbH Mandatory Service Bulletin No. MSB-E4-030/4, Revision 4, dated March 30, 2021 (the MSB), as applicable. (2) Replace the oil filter and engine oil using the Accomplishment/Instructions, paragraph 2.2.1 or paragraph 2.2.2, of the MSB, as applicable. ER23AP21.000
Unsafe condition
This AD was prompted by reports of an oil pump blockage on the E4 model diesel piston engines. The FAA is issuing this AD to prevent failure of the engine lubrication system. The unsafe condition, if not addressed, could result in failure of the engine, in-flight shutdown, and loss of the airplane.
Affected ADs
None.
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