# Proposed AD 2001-NM-250-AD: Bombardier Model CL-600-2B19 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2003-01-02
- Products: Bombardier
- Product type: Aircraft
- Action: Supplemental notice of proposed rulemaking; reopening of comment period.
- Published: August 16, 2002, 67 FR 53525
- Comments due: September 10, 2002
- Became: [AD 2003-01-02](https://openairdocs.org/ad/2003-01-02)
- Docket: 2001-NM-250-AD
- FR document: 02-20711
- Official PDF: https://openairdocs.org/files/sha256/e1/2d/e12d137f71fe0955437dcc93cbd427e52eb8722cfb02eb7129b1d5b2e61018b3 (from https://www.govinfo.gov/content/pkg/FR-2002-08-16/pdf/02-20711.pdf)
- Federal Register: https://www.federalregister.gov/documents/2002/08/16/02-20711/airworthiness-directives-bombardier-model-cl-600-2b19-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/39DCDE5F83F369EF86256C170054AA25.0001
- Page: https://openairdocs.org/proposed/2001-NM-250-AD

## Summary

This document revises an earlier proposed airworthiness directive (AD), applicable to certain Bombardier Model CL-600-2B19 series airplanes, that would have required replacement of the existing smoke detectors in the cargo compartment with new, improved smoke detectors. That proposal was prompted by mandatory continuing airworthiness information from a civil airworthiness authority. This new action revises the proposed rule by including spare part information. The actions specified by this new proposed AD are intended to prevent false smoke warnings from the smoke detectors in the cargo compartment. A false smoke warning prompts the flightcrew to discharge fire extinguisher bottles, leaving those bottles depleted in the event of an actual fire. Repeated false smoke warnings create uncertainty as to whether an emergency landing and emergency evacuation of passengers and flightcrew is warranted.

## Notices in this docket

- Oct 4, 2001: Notice of proposed rulemaking (NPRM). (first notice), FR document 01-24780, comments due Nov 5, 2001 (https://www.federalregister.gov/documents/2001/10/04/01-24780/airworthiness-directives-bombardier-model-cl-600-2b19-series-airplanes)
- Apr 3, 2002: Supplemental notice of proposed rulemaking; reopening of comment period., FR document 02-7994, comments due Apr 29, 2002 (https://www.federalregister.gov/documents/2002/04/03/02-7994/airworthiness-directives-bombardier-model-cl-600-2b19-series-airplanes)
- Aug 16, 2002: Supplemental notice of proposed rulemaking; reopening of comment period., FR document 02-20711, comments due Sep 10, 2002 (https://www.federalregister.gov/documents/2002/08/16/02-20711/airworthiness-directives-bombardier-model-cl-600-2b19-series-airplanes)

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