# Airworthiness Directives; Bell Helicopter Textron Canada Limited Model 427 Helicopters
> **Rule** · Final rule. · Published 2011-03-10 · Effective 2011-04-14 · 76 FR 13061
## Document
- **Document number:** 2011-4468
- **Category:** airworthiness
- **Manufacturer:** Bell Helicopter Textron Canada Limited Model 427
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 76 FR 13061
- **Publication date:** 2011-03-10
- **Effective date:** 2011-04-14
- **FAA docket:** Docket No. FAA-2010-0866
## Abstract

We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2011/03/10/2011-4468/airworthiness-directives-bell-helicopter-textron-canada-limited-model-427-helicopters)
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