# Airworthiness Directives; Bell Textron Inc. (Type Certificate Previously Held by Bell Helicopter Textron Inc.) Helicopters
> **Rule** · Final rule. · Published 2020-09-16 · Effective 2020-10-21 · 85 FR 57671
## Document
- **Document number:** 2020-20275
- **Category:** airworthiness
- **Manufacturer:** Bell Textron Inc. (Type Certificate Previously Held by Bell Helicopter Textron Inc.)
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 57671
- **Publication date:** 2020-09-16
- **Effective date:** 2020-10-21
- **FAA docket:** Docket No. FAA-2020-0561
## Abstract

The FAA is adopting a new airworthiness directive (AD) for Bell Textron Inc. (Type Certificate previously held by Bell Helicopter Textron Inc.) (Bell), Model 204B, 205A-1, and 212 helicopters. This AD was prompted by reports of corrosion on main rotor hub tension-torsion strap (TT strap) assemblies. This AD requires reducing the life limit of a certain part-numbered TT strap assembly and prohibits installing this TT strap assembly on any helicopter. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/09/16/2020-20275/airworthiness-directives-bell-textron-inc-type-certificate-previously-held-by-bell-helicopter)
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