# Airworthiness Directives; Austro Engine GmbH Engines
> **Rule** · Final rule; request for comments. · Published 2018-04-12 · Effective 2018-04-27 · 83 FR 15733
## Document
- **Document number:** 2018-07540
- **Category:** airworthiness
- **Manufacturer:** Austro
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 83 FR 15733
- **Publication date:** 2018-04-12
- **Effective date:** 2018-04-27
- **FAA docket:** Docket No. FAA-2018-0153
## Abstract

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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/04/12/2018-07540/airworthiness-directives-austro-engine-gmbh-engines)
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