# Airworthiness Directives; Austro Engine GmbH Engines
> **Rule** · Final rule; request for comments. · Published 2021-08-06 · Effective 2021-08-23 · 86 FR 43075
## Document
- **Document number:** 2021-16895
- **Category:** airworthiness
- **Manufacturer:** Austro
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 86 FR 43075
- **Publication date:** 2021-08-06
- **Effective date:** 2021-08-23
- **FAA docket:** Docket No. FAA-2021-0654
## Abstract

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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/08/06/2021-16895/airworthiness-directives-austro-engine-gmbh-engines)
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