# Airworthiness Directives; Brantly International, Inc. Model B-2, B-2A, and B-2B Helicopters
> **Rule** · Final rule; request for comments. · Published 2006-04-17 · Effective 2006-05-02 · 71 FR 19624
## Document
- **Document number:** 06-3536
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 71 FR 19624
- **Publication date:** 2006-04-17
- **Effective date:** 2006-05-02
- **FAA docket:** Docket No. FAA-2006-24447
## Abstract

This amendment adopts a new airworthiness directive (AD) for the specified Brantly International, Inc. (Brantly) model helicopters. This action requires certain inspections and measurements of the upper tail rotor vertical gearbox (gearbox), vertical shaft (shaft) and shaft housing (housing) and their associated parts; and of the intermediate gear box bushing (bushing). This amendment is prompted by an accident and an incident report of fatigue cracking of a shaft. The actions specified in this AD are intended to prevent fatigue cracking of a shaft, failure of a shaft, and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/04/17/06-3536/airworthiness-directives-brantly-international-inc-model-b-2-b-2a-and-b-2b-helicopters)
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