# Airworthiness Directives; Bombardier, Inc. Airplanes
> **Rule** · Final rule. · Published 2012-08-21 · Effective 2012-09-25 · 77 FR 50371
## Document
- **Document number:** 2012-20172
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 77 FR 50371
- **Publication date:** 2012-08-21
- **Effective date:** 2012-09-25
- **FAA docket:** Docket No. FAA-2012-0328
## Abstract

We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. This AD was prompted by reports of jamming/malfunctioning of the left-hand engine thrust control mechanism. This AD requires modifying the left-hand engine upper core-cowl. We are issuing this AD to prevent jamming/malfunctioning of the left-hand engine thrust control mechanism, which could lead to loss of control of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/08/21/2012-20172/airworthiness-directives-bombardier-inc-airplanes)
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