The pilot in command was demonstrating a 15-degree banked turn at a height of about 700 ft. The aircraft was travelling at 70 kts with 15 degrees of flap extended. However, control of the aircraft was affected by an unseen dust devil which caused it to roll further left to about 90 degrees angle of bank. The pilot applied full right rudder and aileron controls, righting the aircraft just above treetops in a stalled attitude, but was unable to arrest the descent. The aircraft struck trees and came to rest on the ground in an inverted position. Both the pilot and passenger vacated the aircraft, which was subsequently destroyed by an ensuing fire.
