# Airworthiness Directives; Bell Helicopter Textron Helicopters
> **Rule** · Final rule. · Published 2016-10-14 · Effective 2016-11-18 · 81 FR 70928
## Document
- **Document number:** 2016-24741
- **Category:** airworthiness
- **Manufacturer:** Bell Helicopter Textron
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 81 FR 70928
- **Publication date:** 2016-10-14
- **Effective date:** 2016-11-18
- **FAA docket:** Docket No. FAA-2016-6551
## Abstract

We are adopting a new airworthiness directive (AD) for certain Bell Helicopter Textron (Bell) Model 430 helicopters. This AD requires establishing a life limit for a certain main rotor hub attachment bolt (bolt) and removing from service each bolt that has met or exceeded its life limit. This AD was prompted by a documentation error that omitted the life limit of a certain part-numbered bolt from the Airworthiness Limitations section of the maintenance manual. The actions of this AD are intended to establish a life limit for a certain part-numbered bolt to prevent failure of a bolt, failure of a main rotor hub, and subsequent loss of control of a helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/10/14/2016-24741/airworthiness-directives-bell-helicopter-textron-helicopters)
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