Airworthiness Directive · Amendment 39-21684 · Reciprocating engine oil system
Austro Engine GmbH Engines
This AD applies to Austro Engine GmbH E4 and E4P model diesel piston engines.
The FAA is adopting a new airworthiness directive (AD) for all Austro Engine GmbH E4 and E4P model diesel piston engines. This AD was prompted by a report of oil pressure loss on an E4 model diesel piston engine. This AD requires removing a certain oil pump from service and replacing it with a part eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products.
Before further flight after the effective date of this AD, remove the oil pump, part number (P/N) E4A-50-000-BHY, with a serial number (S/N) listed in paragraph 1.2., Engines Affected, Tables 2 and 3, of Austro Engine GmbH Mandatory Service Bulletin No. MSB-E4-031/1, Revision No. 1, dated July 1, 2021 (the MSB), from service and replace with a part eligible for installation using the Accomplishment/Instructions, paragraph 2.2.1 or paragraph 2.2.2., of the MSB, as applicable.
The instructions to contact the manufacturer and report information to the manufacturer in the Accomplishment/Instructions, paragraph 2.2, of the MSB, are not required by this AD.
After the effective date of this AD, do not install onto any engine an oil pump with P/N E4A-50-000-BHY and an S/N listed in paragraph 1.2., Engines Affected, Tables 2 and 3, of the MSB.
For the purpose of this AD, a “part eligible for installation” is an oil pump that is not P/N E4A-50-000-BHY or an oil pump P/N E4A-50-000-BHY and an S/N that is not listed in paragraph 1.2., Engines Affected, Tables 2 and 3, of the MSB.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
