# Airworthiness Directives; Turbomeca Arrius 2F Turboshaft Engines
> **Rule** · Final rule; request for comments. · Published 2005-08-26 · Effective 2005-09-12 · 70 FR 50168
## Document
- **Document number:** 05-16902
- **Category:** airworthiness
- **Manufacturer:** Turbomeca Arrius 2F Turboshaft
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 70 FR 50168
- **Publication date:** 2005-08-26
- **Effective date:** 2005-09-12
- **FAA docket:** Docket No. FAA-2005-21924
## Abstract

The FAA is adopting a new airworthiness directive (AD) for Turbomeca Arrius 2F turboshaft engines. This AD requires a one-time removal and inspection of the fuel filter-holder assembly to determine that the fuel control unit (FCU) filter is dimensionally correct. The AD also requires updating the Engine Maintenance Manuals to include a dimensional check of the fuel filter-holder assembly every time the FCU filter element is removed from the fuel filter-holder assembly. This AD results from reports of restricted fuel flow caused by a dimensionally incorrect FCU filter. Ground run testing may not detect the fuel flow limitation. We are issuing this AD to detect a dimensionally incorrect FCU filter that could lead to an undetected limitation of fuel flow, limiting the maximum power available in-flight, which could result in the inability to continue safe flight, avoid obstacles or land safely.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/08/26/05-16902/airworthiness-directives-turbomeca-arrius-2f-turboshaft-engines)
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