# Airworthiness Directives; Bombardier, Inc., Airplanes
> **Rule** · Final rule. · Published 2018-01-29 · Effective 2018-03-05 · 83 FR 3939
## Document
- **Document number:** 2018-01317
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 3939
- **Publication date:** 2018-01-29
- **Effective date:** 2018-03-05
- **FAA docket:** Docket No. FAA-2017-0621
## Abstract

We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model DHC-8-400 series airplanes. This AD was prompted by reports that operation of fuselage doors was interrupted due to corrosion in certain door roller bearings. This AD requires a one-time detailed inspection of the bearings for corrosion, and replacement if necessary. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/01/29/2018-01317/airworthiness-directives-bombardier-inc-airplanes)
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