# Proposed AD FAA-2013-0381: Turbomeca S.A. Turboshaft Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2014-04-06
- Products: Turbomeca
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 25, 2013, 78 FR 44897
- Comments due: September 23, 2013
- Became: [AD 2014-04-06](https://openairdocs.org/ad/2014-04-06)
- Docket: FAA-2013-0381 (https://www.regulations.gov/docket/FAA-2013-0381, where comments are filed)
- Project: 2013-NE-16-AD
- FR document: 2013-17864
- Official PDF: https://openairdocs.org/files/sha256/e8/b4/e8b40717c4c02e922576f8a688acd6c66bc9e9dbef4301a0ffe89c862e212f9a (from https://www.govinfo.gov/content/pkg/FR-2013-07-25/pdf/2013-17864.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/07/25/2013-17864/airworthiness-directives-turbomeca-sa-turboshaft-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5AD295F3180327D986257BB300449E7C.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0381

## Summary

We propose to adopt a new airworthiness directive (AD) for all Turbomeca S.A. Arrius 2B1, 2B1A, 2B2, and 2K1 turboshaft engines. This proposed AD was prompted by in-flight shutdowns caused by interrupted fuel supply at the hydro-mechanical metering unit (HMU). This proposed AD would require initial and repetitive inspections of the HMU high pressure pump drive gear shaft splines, cleaning and inspections of the sleeve assembly splines, and replacement of the HMU if it fails inspection. We are proposing this AD to prevent in-flight shutdown and damage to the engine.

## Notices in this docket

- Jul 25, 2013: Notice of proposed rulemaking (NPRM). (first notice), FR document 2013-17864, comments due Sep 23, 2013 (https://www.federalregister.gov/documents/2013/07/25/2013-17864/airworthiness-directives-turbomeca-sa-turboshaft-engines)

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