 As the aircraft was found airworthy and able to be flown, the bulk of the work of the investigation commission focused on operational procedures.The accident was caused through a series of events which, although not in themselves sufficient to cause the crash, combined to create a breakdown in crew resource management.The flight experienced two delays (de-icing at Seattle–Tacoma and holding at Bakersfield), which along with wind speeds increased the flight time by nearly three hours.