# Airworthiness Directives; Turbomeca Arrius 2 F Turboshaft Engines
> **Rule** · Final rule; request for comments. · Published 2005-09-16 · Effective 2005-10-03 · 70 FR 54622
## Document
- **Document number:** 05-18322
- **Category:** airworthiness
- **Manufacturer:** Turbomeca Arrius 2 F Turboshaft
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 70 FR 54622
- **Publication date:** 2005-09-16
- **Effective date:** 2005-10-03
- **FAA docket:** Docket No. FAA-2005-22430
## Abstract

The FAA is adopting a new airworthiness directive (AD) for Turbomeca Arrius 2 F turboshaft engines. This AD requires removing from service certain serial number (SN) fuel control units (FCUs) or replacing the constant delta pressure diaphragm in those FCUs. This AD results from a report of an accident in July 2005 involving a Eurocopter EC120B helicopter. We are issuing this AD to prevent an uncommanded engine in-flight shutdown on a single-engine helicopter, resulting in a forced autorotation landing or an accident.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/09/16/05-18322/airworthiness-directives-turbomeca-arrius-2-f-turboshaft-engines)
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