# Proposed AD FAA-2010-0436: Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-07-06
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 10, 2010, 75 FR 25788
- Comments due: June 24, 2010
- Became: [AD 2011-07-06](https://openairdocs.org/ad/2011-07-06)
- Docket: FAA-2010-0436 (https://www.regulations.gov/docket/FAA-2010-0436, where comments are filed)
- Project: 2009-NM-230-AD
- FR document: 2010-10884
- Official PDF: https://openairdocs.org/files/sha256/ca/f6/caf6b24f5e48aee4a355a3ff950f2ad87704106aa26ddc87509b487348f5f0b7 (from https://www.govinfo.gov/content/pkg/FR-2010-05-10/pdf/2010-10884.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/05/10/2010-10884/airworthiness-directives-bombardier-inc-model-cl-600-2b19-regional-jet-series-100-and-440-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2D43434F3CF932B18625771F004BCDE4.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0436

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

* * * There have recently been several in-service occurrences that have highlighted the inability of the existing [wing anti-ice] system to detect a low-heat condition in the wing leading edge at all times, with the potential consequence of unannunciated asymmetric ice build-up on the wing. * * * Such a condition, in combination with maneuvers close to stick shaker activation, could possibly result in reduced controllability of the aircraft. * * * * *

The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- May 10, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-10884, comments due Jun 24, 2010 (https://www.federalregister.gov/documents/2010/05/10/2010-10884/airworthiness-directives-bombardier-inc-model-cl-600-2b19-regional-jet-series-100-and-440-airplanes)

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