Airworthiness Directive · Amendment 39-19247 · Reciprocating engine supercharger
Austro Engine GmbH Engines
Superseded. A later AD replaced this one: AD 2020-22-14. Comply with the one in force.
This AD applies to all Austro Engine GmbH model E4 and E4P diesel piston engines.
We are adopting a new airworthiness directive (AD) for all Austro Engine GmbH model E4 and E4P diesel piston engines. This AD requires replacement of the waste gate controller and the control rod circlip. This AD was prompted by reports of broken or disconnected turbocharger waste gate control rods on some engines. We are issuing this AD to address the unsafe condition on these products.
Within the compliance times identified in Table 1 to paragraph (g) of this AD, and thereafter at intervals not to exceed 250 flight hours (FHs), replace the waste gate controller and control rod circlip in accordance with the Accomplishment Instructions, Paragraph 2.1, of Austro Engine GmbH Mandatory Service Bulletin (MSB) No. MSB-E4-022/2, Rev. No. 2, dated November 27, 2017.
Do not install on any engine a non-spring loaded waste gate control rod circlip, part number DIN6799-5, after the effective date of this AD.
For the purpose of this AD, a Group 1 engine is an Austro Engine GmbH model E4-B or E4-C engine installed on a DA 42 M-NG airplane with external containers or an E4-A engine. A Group 2 engine is any other Austro Engine GmbH model E4 and E4P engine.
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.
