# Proposed AD FAA-2021-0781: Austro Engine GmbH Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-24-10
- Products: Austro Engine
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 14, 2021, 86 FR 51026
- Comments due: October 14, 2021
- Became: [AD 2021-24-10](https://openairdocs.org/ad/2021-24-10)
- Docket: FAA-2021-0781 (https://www.regulations.gov/docket/FAA-2021-0781, where comments are filed)
- Project: AD-2021-00775-E
- FR document: 2021-19628
- Official PDF: https://openairdocs.org/files/sha256/0c/5f/0c5f878f9bde9c7e96eb355b9d14fb24c1c7763cbbd5faca83d7248e8644856d (from https://www.govinfo.gov/content/pkg/FR-2021-09-14/pdf/2021-19628.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/09/14/2021-19628/airworthiness-directives-austro-engine-gmbh-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/974BAAD492F1D93086258751004B6BE9.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0781

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2021-09-04, which applies to all Austro Engine GmbH E4 and E4P model diesel piston engines. AD 2021-09-04 requires replacing a certain oil pump as well as the oil filter and engine oil. Since the FAA issued AD 2021-09-04, the FAA determined that the requirement to replace the oil pump should be limited to only Austro Engine E4 and E4P model diesel piston engines with a certain oil pump, identified by part number (P/N) and serial number (S/N), installed. This proposed AD would require replacing a certain oil pump, the oil filter, and the engine oil installed on Austro Engine GmbH E4 and E4P model diesel piston engines. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Sep 14, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-19628, comments due Oct 14, 2021 (https://www.federalregister.gov/documents/2021/09/14/2021-19628/airworthiness-directives-austro-engine-gmbh-engines)

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