# Proposed AD FAA-2015-0900: Turbomeca S.A. Turboshaft Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2015-17-18
- Products: Turbomeca
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 21, 2015, 80 FR 29224
- Comments due: July 20, 2015
- Became: [AD 2015-17-18](https://openairdocs.org/ad/2015-17-18)
- Docket: FAA-2015-0900 (https://www.regulations.gov/docket/FAA-2015-0900, where comments are filed)
- Project: 2015-NE-12-AD
- FR document: 2015-12039
- Official PDF: https://openairdocs.org/files/sha256/44/72/447224bdc02d2c1a2e7a87268470756e95293e639add9444e2078d84a1b6d46a (from https://www.govinfo.gov/content/pkg/FR-2015-05-21/pdf/2015-12039.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/05/21/2015-12039/airworthiness-directives-turbomeca-sa-turboshaft-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6FCBDE40F03FE1DC86257E4C004E2077.0001
- Page: https://openairdocs.org/proposed/FAA-2015-0900

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Turbomeca S.A. Arrius 2F turboshaft engines with a certain part number oil pump installed. This proposed AD was prompted by cases of deterioration of the gas generator front bearing due to a link loss between the pump driver and the oil pump shaft. This proposed AD would require inspection, and if necessary, replacement before further flight of the oil pump driver assembly and/or the oil pump shaft, or the oil pump itself. We are proposing this AD to prevent link loss between the pump driver and the oil pump shaft, which could lead to an engine in- flight shutdown, forced landing, and damage to the helicopter.

## Notices in this docket

- May 21, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-12039, comments due Jul 20, 2015 (https://www.federalregister.gov/documents/2015/05/21/2015-12039/airworthiness-directives-turbomeca-sa-turboshaft-engines)

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