Dramatic DHC-4 Caribou takeoff with rudder and aileron locks fully engaged

This modified version of the de Havilland Canada DHC-4 Caribou which had undergone conversion to turbine power was being tested on 27 August 1992. The gust-lock system had not been fully disengaged ahead of the flight. The rudder and aileron locks were also fully engaged. Once airborne, the aircraft was uncontrollable and crashed, killing all onboard.