# Airworthiness Directives; Bell Textron Canada Limited Helicopters
> **Rule** · Final rule; request for comments. · Published 2025-09-10 · Effective 2025-09-25 · 90 FR 43544
## Document
- **Document number:** 2025-17384
- **Category:** airworthiness
- **Manufacturer:** Bell Textron Canada Limited
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 90 FR 43544
- **Publication date:** 2025-09-10
- **Effective date:** 2025-09-25
- **FAA docket:** Docket No. FAA-2025-2276
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 505 helicopters. This AD was prompted by a report of a crack on the mounting bracket on the oil cooler fan assembly housing. This AD requires a one-time visual inspection for cracks on the mounting bracket on the oil cooler fan assembly housing and modification of the mounting bracket. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2025/09/10/2025-17384/airworthiness-directives-bell-textron-canada-limited-helicopters)
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