Incident Overview
On the morning of the incident, the crew completed two flights in the area. Following engine problems, a technician was asked to perform an engine test run. The aircraft was parked on the ground when the technician proceeded with the test but neglected to install chocks on the wheels.
Sequence of Events
After starting the engine, power was added. The pilot, who was standing by the door, fell out of the airplane as it began to roll. The airplane then took off, climbed to a height of 12 meters, made a sharp left turn, stalled, and crashed inverted. The technician, the sole person on board, was killed.
Investigation Findings
The official investigation determined that during the engine test, the technician started the engine and added full power without properly preparing the airplane and without installing chocks on the wheels. As a result, the aircraft moved roughly and became uncontrollable. Additionally, after liftoff, cargo shifted to the rear of the cabin, causing the aircraft to stall.