Accident Overview
The aircraft was conducting a post-maintenance test flight with six technicians and five crew members aboard, totaling 11 occupants. The takeoff on runway 25 was normal, with a roll of 1,550 to 1,600 meters, followed by a standard rotation and initial climb.
Accident Sequence
After traveling approximately 800 meters and reaching an altitude of 175 meters, the aircraft banked left to an angle of 90°. It then went out of control and crashed in a wooded area near the airport, resulting in a huge explosion. The aircraft was totally destroyed, and all 11 occupants were killed.
Investigation Findings
Investigators determined that the accident was the consequence of an error by the technicians who failed to reconnect the rudder control system according to the manufacturer's procedures. The system was cross-connected by mistake, rendering the aircraft uncontrollable.