# Airworthiness Directives; Bell Helicopter Textron Helicopters
> **Rule** · Final rule. · Published 2012-11-15 · Effective 2012-12-20 · 77 FR 68055
## Document
- **Document number:** 2012-27059
- **Category:** airworthiness
- **Manufacturer:** Bell Helicopter Textron
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 77 FR 68055
- **Publication date:** 2012-11-15
- **Effective date:** 2012-12-20
- **FAA docket:** Docket No. FAA-2012-0530
## Abstract

We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron (BHT) Model 412, 412EP, and 412CF helicopters. This AD requires a repetitive inspection of the collective lever for a crack, and if there is a crack, before further flight, replacing the collective lever with an airworthy collective lever. This AD was prompted by a reported failure of a collective lever. The actions are intended to detect a crack in the collective lever, which could lead to failure of the collective lever and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/11/15/2012-27059/airworthiness-directives-bell-helicopter-textron-helicopters)
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