# Airworthiness Directives; Bell Helicopter Textron Canada (BHTC) Model 206L-4 Helicopters
> **Rule** · Final rule; request for comments. · Published 1999-06-17 · Effective 1999-07-02 · 64 FR 32398
## Document
- **Document number:** 99-15363
- **Category:** airworthiness
- **Manufacturer:** Bell Helicopter Textron Canada (BHTC) Model 206L-4
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 64 FR 32398
- **Publication date:** 1999-06-17
- **Effective date:** 1999-07-02
- **FAA docket:** Docket No. 98-SW-66-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to BHTC Model 206L-4 helicopters. This action requires a reduction in the retirement lives of certain collective idler links and collective levers, and re-identifying certain collective idler links and collective levers. This amendment is prompted by the discovery of two types of collective idler links and collective levers--manufactured from different materials--that are identified with the same part numbers but should have substantially different retirement lives. The actions specified in this AD are intended to prevent use of a collective idler link (link) or collective lever (lever) beyond its retirement life, which could lead to failure of the link or lever and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/06/17/99-15363/airworthiness-directives-bell-helicopter-textron-canada-bhtc-model-206l-4-helicopters)
---
*AI Analytics · CC0 1.0*