# Proposed AD FAA-2022-1239: 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 2022-26-01
- Products: GE Aviation Czech s.r.o.
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 27, 2022, 87 FR 58466
- Comments due: November 14, 2022
- Became: [AD 2022-26-01](https://openairdocs.org/ad/2022-26-01)
- Docket: FAA-2022-1239 (https://www.regulations.gov/docket/FAA-2022-1239, where comments are filed)
- Project: MCAI-2022-00301-E
- FR document: 2022-20857
- Official PDF: https://openairdocs.org/files/sha256/b9/8a/b98acab0e9670f52a8e763c8e7939294d48862a6182ecb8c1d677673290ad945 (from https://www.govinfo.gov/content/pkg/FR-2022-09-27/pdf/2022-20857.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/09/27/2022-20857/airworthiness-directives-ge-aviation-czech-sro-type-certificate-previously-held-by-walter-engines-as
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-20857-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2022-1239

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain GE Aviation Czech s.r.o. (GEAC) M601D-11, M601E-11, M601E- 11A, M601E-11AS, M601E-11S, M601F, H75-100, H75-200, H80, H80-100, H80- 200, H85-100, and H85-200 model turboprop engines. This proposed AD was prompted by reports of cracks in dilution tube weld areas of the combustion chamber outer liner. This proposed AD would require initial and repetitive borescope inspections (BSIs) of the dilution tube weld areas of the combustion chamber outer liner and, depending on the results of the inspections, replacement of the combustion chamber outer liner with a part eligible for installation. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Sep 27, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-20857, comments due Nov 14, 2022 (https://www.federalregister.gov/documents/2022/09/27/2022-20857/airworthiness-directives-ge-aviation-czech-sro-type-certificate-previously-held-by-walter-engines-as)

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