# Airworthiness Directives; Bombardier, Inc. Airplanes
> **Rule** · Final rule. · Published 2020-05-06 · Effective 2020-06-10 · 85 FR 26842
## Document
- **Document number:** 2020-09663
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 26842
- **Publication date:** 2020-05-06
- **Effective date:** 2020-06-10
- **FAA docket:** Docket No. FAA-2020-0092
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes, Model CL-600-2C10 (Regional Jet Series 700, 701 & 702) airplanes, Model CL-600-2D15 (Regional Jet Series 705) airplanes, and Model CL-600-2D24 (Regional Jet Series 900) airplanes; and all Bombardier, Inc., Model CL-600-2C11 (Regional Jet Series 550) airplanes. This AD was prompted by reports of fractured rudder primary feel unit shafts; a subsequent investigation determined that the fractures in the shafts are consistent with fatigue damage. This AD requires replacement of the rudder primary feel unit shaft. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/05/06/2020-09663/airworthiness-directives-bombardier-inc-airplanes)
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