# Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters
> **Rule** · Final rule. · Published 2019-12-06 · Effective 2020-01-10 · 84 FR 66838
## Document
- **Document number:** 2019-26298
- **Category:** airworthiness
- **Manufacturer:** Bell Helicopter Textron Canada Limited
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 84 FR 66838
- **Publication date:** 2019-12-06
- **Effective date:** 2020-01-10
- **FAA docket:** Docket No. FAA-2017-1105
## Abstract

The FAA is adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada Limited (BHTC) Model 427 helicopters. This AD requires inspecting the inboard skin of the vertical fin around the four tailboom attachment points. This AD was prompted by reports of cracked vertical fin skins that resulted from metal fatigue. The actions of this AD are intended to prevent an unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2019/12/06/2019-26298/airworthiness-directives-bell-helicopter-textron-canada-limited-helicopters)
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