# Airworthiness Directives; Bell Helicopter Textron, Inc. Model 205B and 212 Helicopters
> **Rule** · Final rule; request for comments. · Published 2010-02-04 · Effective 2010-02-19 · 75 FR 5681
## Document
- **Document number:** 2010-1720
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 75 FR 5681
- **Publication date:** 2010-02-04
- **Effective date:** 2010-02-19
- **FAA docket:** Docket No. FAA-2010-0065
## Abstract

This amendment adopts a new airworthiness directive (AD) for Bell Helicopter Textron, Inc. (Bell) Model 205B and 212 helicopters with certain main rotor (M/R) blade assemblies installed. This action requires inspecting the M/R blades paying particular attention to an area near the blade root for an edge void, corrosion, or a crack. This amendment is prompted by two reports of fatigue cracks on M/R blades installed on Model 212 helicopters. Both model helicopters use the same part-numbered M/R blades. The actions specified in this AD are intended to detect an edge void, corrosion, or a crack on a M/R blade, which could lead to loss of the M/R blade and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/02/04/2010-1720/airworthiness-directives-bell-helicopter-textron-inc-model-205b-and-212-helicopters)
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