Accident Sequence
The aircraft was engaged in a local training flight. After takeoff from runway 24, during the initial climb, the airplane suffered two consecutive stalls then banked left and right. It lost height and crashed in a huge explosion, killing both pilots. The aircraft was observed entering three stalls, with two stalls followed by normal recovery.
Probable Cause
The official probable cause states that the crew failed to obtain/maintain flying speed and there was inadequate supervision of the flight on the part of the pilot-in-command.
Aircraft Configuration at Loss of Control
When control was lost, the landing gear was down, flaps were set to 3/4 down, and the rudder trim was positioned full left.