What happened
During an on-demand cargo operation, a twin engine aircraft departed from Yellowknife Airport and immediately experienced significant issues maintaining altitude. Following the loss of climb performance, the aircraft struck a building and crashed. The accident resulted in two fatalities, claiming the lives of both crew members on board.
Findings
Investigations into the crash identified several critical factors that contributed to the loss of flight capability. It was determined that the aircraft's total weight exceeded its maximum takeoff weight by 1,400 pounds. Additionally, the plane had remained stationary on the ramp for six days leading up to the flight. During this period, ice or other contaminants accumulated on the airframe. The crew did not perform any deicing or defrosting procedures before takeoff. This accumulation of weight and the presence of surface contaminants led to a reduction in aerodynamic performance and a loss of lift, making it impossible for the overloaded aircraft to climb safely.