# Airworthiness Directives; Bell Helicopter Textron Canada Model 407 and 427 Helicopters
> **Rule** · Final rule; request for comments. · Published 2009-10-30 · Effective 2009-11-16 · 74 FR 56104
## Document
- **Document number:** E9-26120
- **Category:** airworthiness
- **Manufacturer:** Bell Helicopter Textron Canada Model 407 and 427
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 74 FR 56104
- **Publication date:** 2009-10-30
- **Effective date:** 2009-11-16
- **FAA docket:** Docket No. FAA-2009-1003
## Abstract

We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada (Bell) Model 407 and 427 helicopters. This AD results from a mandatory continuing airworthiness information (MCAI) AD issued by the aviation authority of Canada. The MCAI AD states that, during a preflight check, it was observed that the swashplate link assembly bearing had moved in the lever race, making contact with the swashplate support. The MCAI also states that further investigation revealed that the bearing had not been staked correctly during manufacture. That condition, if not detected, could result in failure of a bearing, failure of the swashplate link assembly, and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/10/30/E9-26120/airworthiness-directives-bell-helicopter-textron-canada-model-407-and-427-helicopters)
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