# Proposed AD FAA-2015-7490: Turbomeca S.A. Turboshaft Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-09-02
- Products: Turbomeca
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 2, 2016, 81 FR 5395
- Comments due: April 4, 2016
- Became: [AD 2016-09-02](https://openairdocs.org/ad/2016-09-02)
- Docket: FAA-2015-7490 (https://www.regulations.gov/docket/FAA-2015-7490, where comments are filed)
- Project: 2015-NE-40-AD
- FR document: 2016-01770
- Official PDF: https://openairdocs.org/files/sha256/19/83/1983436103465ab078c9d41c3750c7051e19717310a4a310c801d6d438f440f5 (from https://www.govinfo.gov/content/pkg/FR-2016-02-02/pdf/2016-01770.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/02/02/2016-01770/airworthiness-directives-turbomeca-sa-turboshaft-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4FA673332DA1DF9486257F4D00509BDA.0001
- Page: https://openairdocs.org/proposed/FAA-2015-7490

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Turbomeca S.A. Astazou XIV B and H turboshaft engines. This proposed AD was prompted by a report of a crack on the 3rd stage turbine wheel. This proposed AD would require a one-time inspection of the front surface of the 3rd stage turbine for a groove. We are proposing this AD to prevent cracks in the 3rd stage turbine wheel, failure of the engine, in-flight shutdown, and loss of control of the helicopter.

## Notices in this docket

- Feb 2, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-01770, comments due Apr 4, 2016 (https://www.federalregister.gov/documents/2016/02/02/2016-01770/airworthiness-directives-turbomeca-sa-turboshaft-engines)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.