# Airworthiness Directives; Eurocopter France Helicopters
> **Rule** · Final rule; request for comments. · Published 2012-09-25 · Effective 2012-10-10 · 77 FR 58925
## Document
- **Document number:** 2012-23448
- **Category:** airworthiness
- **Manufacturer:** Eurocopter France
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 77 FR 58925
- **Publication date:** 2012-09-25
- **Effective date:** 2012-10-10
- **FAA docket:** Docket No. FAA-2012-1018
## Abstract

We are adopting a new airworthiness directive (AD) for Eurocopter France (Eurocopter) Model EC 155B, EC155B1, SA-365N1, AS- 365N2 and AS 365 N3 helicopters to require visually inspecting the tail rotor hub (TRH) for a crack and removing the TRH if a crack exists. This AD is prompted by reports of cracks on two TRHs. These actions are intended to prevent the tail rotor from jamming, which could lead to reduced or loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/09/25/2012-23448/airworthiness-directives-eurocopter-france-helicopters)
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