<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by B747-437B:
Considering that CRJs are built by Bombardier in Montreal - probably the best manufacturer of cold weather equipment out there, I highly doubt the credibility of that report. 
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On a Comair flight last winter DTW-CVG they had a problem closing the door. The pilot remarked that it only happened in cold weather. I assume that this plane was a Bombardier.