# Proposed AD FAA-2023-0664: GE Aviation Czech s.r.o. (Type Certificate Previously Held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s.) Turboprop Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2023-12-24
- Products: GE Aviation Czech s.r.o.
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 7, 2023, 88 FR 20784
- Comments due: May 22, 2023
- Became: [AD 2023-12-24](https://openairdocs.org/ad/2023-12-24)
- Docket: FAA-2023-0664 (https://www.regulations.gov/docket/FAA-2023-0664, where comments are filed)
- Project: MCAI-2022-01527-E
- FR document: 2023-07178
- Official PDF: https://openairdocs.org/files/sha256/15/0f/150f57d74bb5b6bcbba10e7d4eb16d8e49dd2cc0dda414c09c99e3fb82edc998 (from https://www.govinfo.gov/content/pkg/FR-2023-04-07/pdf/2023-07178.pdf)
- Federal Register: https://www.federalregister.gov/documents/2023/04/07/2023-07178/airworthiness-directives-ge-aviation-czech-sro-type-certificate-previously-held-by-walter-engines-as
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2023-07178-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2023-0664

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all GE Aviation Czech s.r.o. (GEAC) M601E-11AS, M601E[hyphen]11S, H75-100, H80-100, and H85-100 model turboprop engines. This proposed AD was prompted by reports of multiple failures of the needle bearing installed in propeller governors having part numbers (P/Ns) P-W11-1 or P-W11-2, caused by self-generated debris from the needle bearing, which led to oil contamination. This proposed AD would require replacement of the affected propeller governors with a redesigned propeller governor, and would prohibit installation of the affected propeller governors, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference (IBR). The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Apr 7, 2023: Notice of proposed rulemaking (NPRM). (first notice), FR document 2023-07178, comments due May 22, 2023 (https://www.federalregister.gov/documents/2023/04/07/2023-07178/airworthiness-directives-ge-aviation-czech-sro-type-certificate-previously-held-by-walter-engines-as)

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