# Airworthiness Directives; Bell Helicopter Textron Canada Inc. Helicopters
> **Rule** · Final rule. · Published 2013-09-06 · Effective 2013-10-11 · 78 FR 54751
## Document
- **Document number:** 2013-21578
- **Category:** airworthiness
- **Manufacturer:** Bell Helicopter Textron Canada Inc.
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 78 FR 54751
- **Publication date:** 2013-09-06
- **Effective date:** 2013-10-11
- **FAA docket:** Docket No. FAA-2013-0349
## Abstract

We are adopting a new airworthiness directive (AD) for certain Bell Helicopter Textron Canada Inc. (BHT) Model 206A, 206B, and 206L helicopters. This AD requires replacing certain part-numbered engine auto-relight kit control boxes. This AD was prompted by a design review that revealed the control box chipset did not meet the required temperature range requirements, which could cause the control box to malfunction, disabling the engine auto-relight system. The actions of this AD are intended to prevent a disabled auto-relight system, failure of the engine to relight after a flame-out, increased pilot workload during a power loss emergency, and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/09/06/2013-21578/airworthiness-directives-bell-helicopter-textron-canada-inc-helicopters)
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