# Airworthiness Directives; Eurocopter France Helicopters
> **Rule** · Final rule; request for comments. · Published 2012-10-23 · Effective 2012-11-07 · 77 FR 64706
## Document
- **Document number:** 2012-25894
- **Category:** airworthiness
- **Manufacturer:** Eurocopter France
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 77 FR 64706
- **Publication date:** 2012-10-23
- **Effective date:** 2012-11-07
- **FAA docket:** Docket No. FAA-2012-1128
## Abstract

We are adopting a new airworthiness directive (AD) for Eurocopter France (Eurocopter) Model EC225 helicopters with certain epicyclic modules installed. This AD requires inspecting the epicyclic module for the presence of a through-hole upstream of the magnetic plug. This AD is prompted by a report of a missing through-hole between the integrated collector and the magnetic plug, which would prevent the flow of chips from the integrated collector to the magnetic plug. This could result in the chip-detector system failing to detect deterioration of the main rotor mast lift bearing (lift bearing). These actions are intended to detect a missing through-hole and prevent lift bearing failure and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/10/23/2012-25894/airworthiness-directives-eurocopter-france-helicopters)
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