# Airworthiness Directives; Eurocopter France Model SA-360C, SA-365C, SA-365C1, and SA-365C2 Helicopters
> **Rule** · Final rule; request for comments. · Published 2006-04-13 · Effective 2006-04-28 · 71 FR 19110
## Document
- **Document number:** 06-3535
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 71 FR 19110
- **Publication date:** 2006-04-13
- **Effective date:** 2006-04-28
- **FAA docket:** Docket No. FAA-2006-24446
## Abstract

This amendment adopts a new airworthiness directive (AD) for Eurocopter France (Eurocopter) Model SA-360C, SA-365C, SA-365C1, and SA-365C2 helicopters. This action requires inspecting the main gearbox (MGB) base plate for a crack and replacing the MGB if a crack is found. This amendment is prompted by the discovery of a crack in a MGB base plate. The actions specified in this AD are intended to detect a crack in a MGB base plate and prevent failure of one of the MGB attachment points to the frame, which could result in severe vibration and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/04/13/06-3535/airworthiness-directives-eurocopter-france-model-sa-360c-sa-365c-sa-365c1-and-sa-365c2-helicopters)
---
*AI Analytics · CC0 1.0*