# Proposed AD FAA-2013-0557: Turbomeca S.A. Turboshaft Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2013-24-05
- Products: Turbomeca
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 12, 2013, 78 FR 48824
- Comments due: October 11, 2013
- Became: [AD 2013-24-05](https://openairdocs.org/ad/2013-24-05)
- Docket: FAA-2013-0557 (https://www.regulations.gov/docket/FAA-2013-0557, where comments are filed)
- Project: 2013-NE-22-AD
- FR document: 2013-19415
- Official PDF: https://openairdocs.org/files/sha256/74/59/7459b802ca00ec9e5ab90cec4cb573d5fb3b179d056f1688ab8c03727461dcdc (from https://www.govinfo.gov/content/pkg/FR-2013-08-12/pdf/2013-19415.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/08/12/2013-19415/airworthiness-directives-turbomeca-sa-turboshaft-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A7257B43004A91EE86257BC5004D953F.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0557

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Turbomeca S.A. Arriel 1A1, 1A2, 1B, 1C, 1C1, 1C2, 1D, 1D1, 1E2, 1K1, 1S, and 1S1 turboshaft engines. This proposed AD was prompted by a ``chip illumination event'' in flight on a Turbomeca S.A. Arriel 1 engine. This proposed AD would require a one-time inspection of the free turbine (FT) module (M04) for the affected Turbomeca S.A. Arriel 1 engines and, if a discrepancy is found, repair of the affected module. We are proposing this AD to prevent a loss of FT bearing lubrication, resulting FT module failure, damage to the engine, and damage to the aircraft.

## Notices in this docket

- Aug 12, 2013: Notice of proposed rulemaking (NPRM). (first notice), FR document 2013-19415, comments due Oct 11, 2013 (https://www.federalregister.gov/documents/2013/08/12/2013-19415/airworthiness-directives-turbomeca-sa-turboshaft-engines)

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