# Proposed AD FAA-2022-1302: 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 2023-01-07
- Products: GE Aviation Czech s.r.o.
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 24, 2022, 87 FR 64175
- Comments due: December 8, 2022
- Became: [AD 2023-01-07](https://openairdocs.org/ad/2023-01-07)
- Docket: FAA-2022-1302 (https://www.regulations.gov/docket/FAA-2022-1302, where comments are filed)
- Project: MCAI-2022-00062-E
- FR document: 2022-22399
- Official PDF: https://openairdocs.org/files/sha256/99/23/99233d137d1bbfb5115bbe615afdc022cd462455fcef32d96227f02a139f26ed (from https://www.govinfo.gov/content/pkg/FR-2022-10-24/pdf/2022-22399.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/10/24/2022-22399/airworthiness-directives-ge-aviation-czech-sro-type-certificate-previously-held-by-walter-engines-as
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-22399-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2022-1302

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all GE Aviation Czech s.r.o. (GEAC) H75-100, H75-200, H80, H80-100, H80-200, H85-100, and H85-200 model turboprop engines. This proposed AD was prompted by the manufacturer revising the airworthiness limitations section (ALS) of the existing engine maintenance manual (EMM) to introduce updated coefficients for the calculation of the cyclic life and safe life for the main shaft. This proposed AD would require revising the ALS of the existing EMM and the operator's existing approved maintenance or inspection program, as applicable, to incorporate the updated coefficients and recalculate the cycles accumulated on critical parts. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Oct 24, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-22399, comments due Dec 8, 2022 (https://www.federalregister.gov/documents/2022/10/24/2022-22399/airworthiness-directives-ge-aviation-czech-sro-type-certificate-previously-held-by-walter-engines-as)

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