# Airworthiness Directives; Bell Helicopter Textron Model 206A and 206B Helicopters
> **Rule** · Final rule. · Published 2005-08-08 · Effective 2005-09-12 · 70 FR 45526
## Document
- **Document number:** 05-15581
- **Category:** airworthiness
- **Manufacturer:** Bell Helicopter Textron Model 206A and 206B
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 70 FR 45526
- **Publication date:** 2005-08-08
- **Effective date:** 2005-09-12
- **FAA docket:** Docket No. FAA-2005-21230
## Abstract

This amendment adopts a new airworthiness directive (AD) for Bell Helicopter Textron (Bell) Model 206A and 206B helicopters modified by Aeronautical Accessories, Inc. Supplemental Type Certificate (STC) SH1392SO with certain part-numbered high crosstubes. This amendment requires inspecting at specified time intervals and replacing any cracked crosstubes. This amendment is prompted by the discovery of a cracked high forward crosstube. The actions specified by this AD are intended to detect a crack in the crosstube which could lead to failure of the crosstube, collapse of the landing gear, and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/08/08/05-15581/airworthiness-directives-bell-helicopter-textron-model-206a-and-206b-helicopters)
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