sentence: incident a boeing 737-500 , similar to the one in this photograph , was used for continental airlines flight 1404 on saturday , december 20 , 2008 at approximately 18 : 18 ( 06 : 18pm ) local time , after being cleared for takeoff on runway 34r at denver international airport , the boeing 737-524 aircraft veered off the side of the runway before taxiway wc ( less than from the threshold ) , skidded across the taxiway and a service road and crashed in a ravine several hundred yard from the runway .