What happened
During a training maneuver involving a full-flap landing followed by a transition to a no-flap takeoff configuration, the Fairchild experienced a loss of directional control. As the aircraft reached rotation speed, it veered toward the left side of the runway. The aircraft subsequently cartwheeled off the paved surface, eventually coming to a stop approximately 557 feet to the left of the runway centerline and 6000 feet from the end of the takeoff area.
Post-accident inspection revealed an irregular flap configuration during the flight. While the right inboard and outboard flaps were found in the fully extended position, the left side of the wing was asymmetrical; specifically, the left inboard flap was only extended to 17 degrees, and the left outboard flap was completely retracted.