# Airworthiness Directives; Eurocopter France Model AS 365 N3 and EC 155B Helicopters
> **Rule** · Final rule. · Published 2003-09-18 · Effective 2003-10-23 · 68 FR 54653
## Document
- **Document number:** 03-23830
- **Category:** airworthiness
- **Manufacturer:** Eurocopter France Model AS 365 N3 and EC 155B
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 68 FR 54653
- **Publication date:** 2003-09-18
- **Effective date:** 2003-10-23
- **FAA docket:** Docket No. 2001-SW-61-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to Eurocopter France (Eurocopter) Model AS 365 N3 and EC 155B helicopters, that requires replacing each Fenestron pitch change control rod (control rod) with an improved reinforced steel airworthy control rod. This amendment is prompted by a failure of a control rod on a prototype helicopter and by the manufacturer making available a newly-designed reinforced steel control rod. The actions specified by this AD are intended to prevent failure of the control rod, loss of control of the tail rotor, and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2003/09/18/03-23830/airworthiness-directives-eurocopter-france-model-as-365-n3-and-ec-155b-helicopters)
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