# Proposed AD FAA-2018-0916: BRP-Rotax GmbH & Co KG Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2019-10-04
- Products: BRP-Rotax
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 6, 2018, 83 FR 55502
- Comments due: December 21, 2018
- Became: [AD 2019-10-04](https://openairdocs.org/ad/2019-10-04)
- Docket: FAA-2018-0916 (https://www.regulations.gov/docket/FAA-2018-0916, where comments are filed)
- FR document: 2018-24044
- Official PDF: https://openairdocs.org/files/sha256/02/f2/02f2b3541626b296eab4bf73608173ca8897f18a25841637e218696f7d12acc8 (from https://www.govinfo.gov/content/pkg/FR-2018-11-06/pdf/2018-24044.pdf)
- Federal Register: https://www.federalregister.gov/documents/2018/11/06/2018-24044/airworthiness-directives-brp-rotax-gmbh-and-co-kg-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/84DCFBB0306501478625833D00533AC5.0001
- Page: https://openairdocs.org/proposed/FAA-2018-0916

## Summary

We propose to adopt a new airworthiness directive (AD) for certain BRP-Rotax GmbH & Co KG (Rotax) 912 and 914 model engines. This proposed AD was prompted by power loss and engine revolutions per minute (RPM) drop on Rotax 912 and 914 model engines due to a quality control deficiency in the manufacturing process of certain valve push- rod assemblies resulting in partial wear on the rocker arm ball socket and possible malfunction of the valve. This proposed AD would require a one-time inspection and, depending on the findings, replacement of the affected parts with parts eligible for installation. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Nov 6, 2018: Notice of proposed rulemaking (NPRM). (first notice), FR document 2018-24044, comments due Dec 21, 2018 (https://www.federalregister.gov/documents/2018/11/06/2018-24044/airworthiness-directives-brp-rotax-gmbh-and-co-kg-engines)

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