# Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited)
> **Rule** · Final rule. · Published 2021-07-23 · Effective 2021-08-27 · 86 FR 38907
## Document
- **Document number:** 2021-15478
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 38907
- **Publication date:** 2021-07-23
- **Effective date:** 2021-08-27
- **FAA docket:** Docket No. FAA-2010-0865
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Bell Helicopter Textron Canada Limited (now Bell Textron Canada Limited) Model 206A, 206B, 206L, 206L-1, 206L-3, and 206L-4 helicopters. This AD was prompted by a report that a certain tail rotor disc assembly, sold as an alternate part, does not conform to the approved configuration. This AD requires determining if an affected part is installed (by doing a maintenance records check or inspection), and if an affected part is found, replacement with a non-affected part. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/07/23/2021-15478/airworthiness-directives-bell-textron-canada-limited-type-certificate-previously-held-by-bell)
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