# Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
> **Rule** · Final rule. · Published 2022-02-10 · Effective 2022-03-17 · 87 FR 7690
## Document
- **Document number:** 2022-02754
- **Category:** airworthiness
- **Manufacturer:** De Havilland
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 87 FR 7690
- **Publication date:** 2022-02-10
- **Effective date:** 2022-03-17
- **FAA docket:** Docket No. FAA-2021-0694
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain De Havilland Aircraft of Canada Limited Model DHC-8-401 and - 402 airplanes. This AD was prompted by reports of a possible hard contact between the #2 top high level sensor (HLS) terminal screw head and the #6 outer wing fuel access panel stiffener flange. This AD requires removing and replacing or reworking the #6 outer wing fuel access panel assembly. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2022/02/10/2022-02754/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by)
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