Bombardier CL-600-2B19: Regional Jet Series 100/200/440 - Service Difficulty Alert

AL 2009-05 
16 July 2009

All RJ aircraft with third crewmember oxygen systems installed

Inspection of third crewmember oxygen hose

While parked at the gate, following the application of ground power, a CL-600-2B19 model CRJ-200 aircraft suffered a fire in the vicinity of the JB1 junction box assembly. The fire was fed by oxygen from a breach of the third crewmember oxygen supply installation, forward of the JB1 junction box. The two crewmembers on board were not injured.


As of the date of this publication, the breach of the oxygen hose has not been determined to be causal in the initial event. The event remains under investigation by Bombardier and the NTSB.

Bombardier has issued Service Information Letter (SIL) CRJ100/200/440-SL-35-005 that provides interim inspection recommendations to insure the integrity of the installation of the third crewmember oxygen flexible hose. Particular attention to this area should be taken when complying with the required zonal inspection of this area.

Transport Canada Civil Aviation strongly recommends operators inspect the third crewmember oxygen flexible hose for damage and security of installation in accordance with Bombardier SIL CRJ100/200/440-SL-35-005. Replace damaged hoses in accordance with Aircraft Maintenance Manual.

Damaged hoses are requested to be forwarded to Bombardier for examination.

For more information contact a Transport Canada Centre; or contact Paul Jones, in Ottawa, by phone 613-952-4431, or e-mail at

Any further defects or occurrences should be reported to Transport Canada via the Web Service Difficulty Reporting System (WSDRS) or via e-mail at

For Director, National Aircraft Certification

Eric Lucas
Acting Chief, Continuing Airworthiness