# Airworthiness Directives; Bombardier, Inc., Airplanes
> **Rule** · Final rule. · Published 2018-03-23 · Effective 2018-04-27 · 83 FR 12659
## Document
- **Document number:** 2018-05014
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 12659
- **Publication date:** 2018-03-23
- **Effective date:** 2018-04-27
- **FAA docket:** Docket No. FAA-2017-0495
## Abstract

We are adopting a new airworthiness directive (AD) for all Bombardier, Inc., Model CL-600-2B19 (Regional Jet Series 100 & 440), Model CL-600-2C10 (Regional Jet Series 700, 701, & 702), Model CL-600- 2D15 (Regional Jet Series 705), and Model CL-600-2D24 (Regional Jet Series 900) airplanes. This AD was prompted by development of a modification to prevent uncommanded rudder movement during flight. This AD requires modifying the wiring harness of the yaw damper control system. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/03/23/2018-05014/airworthiness-directives-bombardier-inc-airplanes)
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