# Airworthiness Directives; Bell Helicopter Textron Model 204B, 205A, 205A-1, 205B, 210, 212, 412, 412CF, and 412EP Helicopters
> **Rule** · Final rule; request for comments. · Published 2008-05-06 · Effective 2008-05-21 · 73 FR 24858
## Document
- **Document number:** E8-9790
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 73 FR 24858
- **Publication date:** 2008-05-06
- **Effective date:** 2008-05-21
- **FAA docket:** Docket No. FAA-2008-0490
## Abstract

This amendment adopts a new airworthiness directive (AD) for the specified Bell Helicopter Textron (Bell) model helicopters. This action requires certain checks and inspections of each tail rotor blade assembly (T/R blade) at specified intervals and repairing or replacing, as applicable, any unairworthy T/R blade. This amendment is prompted by three failures of a T/R blade occurring during flight and a recent incident of a cracked T/R blade discovered during a scheduled visual inspection. The actions specified in this AD are intended to detect damage to a T/R blade that could lead to cracking of a T/R blade and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2008/05/06/E8-9790/airworthiness-directives-bell-helicopter-textron-model-204b-205a-205a-1-205b-210-212-412-412cf-and)
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