# Airworthiness Directives; Bombardier, Inc. Airplanes
> **Rule** · Final rule. · Published 2016-05-02 · Effective 2016-06-06 · 81 FR 26102
## Document
- **Document number:** 2016-09791
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 81 FR 26102
- **Publication date:** 2016-05-02
- **Effective date:** 2016-06-06
- **FAA docket:** Docket No. FAA-2015-4814
## 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 the discovery of a number of incorrectly calibrated angle of attack (AOA) transducers installed in the stall protection system. This AD requires replacement of incorrectly calibrated AOA transducers. We are issuing this AD to detect and replace incorrectly calibrated AOA transducers; incorrect calibration of the transducers could result in late activation of the stick pusher.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/05/02/2016-09791/airworthiness-directives-bombardier-inc-airplanes)
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