Crash of a De Havilland U-1A Otter in Toronto: 4 killed
Date & Time:
Feb 14, 1956 at 1538 LT
Registration:
55-3252
Survivors:
No
Schedule:
Toronto - Toronto
MSN:
92
YOM:
1956
Crew on board:
4
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
4
Captain / Total hours on type:
441.00
Copilot / Total hours on type:
11
Aircraft flight hours:
6
Circumstances:
The single engine airplane departed Toronto-Downsview Airport at 1521LT on a local training flight, carrying one Canadian instructor from De Havilland and three pilots (one pilot and two student pilots) of the US Army. 17 minutes after takeoff, while cruising in the vicinity of the airfield, the airplane suffered a structural failure of its right wing that detached, passed over the fuselage and hit the tail that was sheared off. Out of control, the airplane dove into the ground and crashed in a snow covered field, bursting into flames. The airplane was totally destroyed and all four occupants were killed.
Crew:
William A. Ferderber, instructor,
Maj Aaron G. Atkisson, student pilot,
Cpt James P. Dowling, student pilot,
Cpt Louis Durant, pilot.
Crew:
William A. Ferderber, instructor,
Maj Aaron G. Atkisson, student pilot,
Cpt James P. Dowling, student pilot,
Cpt Louis Durant, pilot.
Probable cause:
The failure of the right wing was caused by excessive negative lift forces upon the aircraft, resulting in complete severance. This force was imposed by penetration of the wing vortex turbulence area caused by a Avro Canada CF-100 Canuck. These negative G forces were in excess of the design criteria for the aircraft.
Final Report: