Narrative:The Viscount was being used for a 3-engine training flight when it crashed soon after lifting off the runway. It was established that the three non-surviving crewmembers may have survived if they had been wearing the full safety harness.
PROBABLE CAUSE: "An error of judgement on the part of the pilot-in-command in that he took the aircraft into the air at a speed below the minimum control speed, following loss of directional control during the ground run. Some difficulty in maintaining directional control had been experienced during the takeoff run with the final loss probably occurred through nose wheel steering being relinquished as the pilot-in-command took over the controls. A factor probably contributing to this accident was the limited experience of the pilot-in-command on this type of aircraft."
» ICAO Accident Digest, Circular 47-AN/42 (162-169)
This information is not presented as the Flight Safety Foundation or the Aviation Safety Networkĺs opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.