# Airworthiness Directives; Eurocopter France Model EC120 Helicopters
> **Rule** · Final rule. · Published 2005-05-09 · Effective 2005-06-13 · 70 FR 24304
## Document
- **Document number:** 05-8951
- **Category:** airworthiness
- **Manufacturer:** Eurocopter France Model EC120
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 70 FR 24304
- **Publication date:** 2005-05-09
- **Effective date:** 2005-06-13
- **FAA docket:** Docket No. FAA-2005-20289
## Abstract

This amendment adopts a new airworthiness directive (AD) for Eurocopter France (Eurocopter) Model EC120 helicopters that requires inspecting the tail rotor drive shaft (drive shaft) damper half-clamps (half-clamps) to determine if they are centered on the friction ring, and if not correctly positioned, centering the half-clamps on the friction ring. This amendment is prompted by the discovery of half- clamps that were incorrectly positioned. The actions specified by this AD are intended to detect incorrect positioning of the drive shaft half-clamps, and to prevent interference of the half-clamps with the drive shaft, which could result in scoring on the drive shaft, failure of the drive shaft, and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/05/09/05-8951/airworthiness-directives-eurocopter-france-model-ec120-helicopters)
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