Accident Details
The accident occurred during a local test flight of an Antonov AN-10 prototype. Shortly after takeoff from Voronezh Airport, while climbing to an altitude of 500 meters, engine number one failed. To prevent asymmetric thrust, the crew immediately reduced the power of engine number four to 40% of its nominal value. Seconds later, engine number three also failed. The same procedure was applied to engine number two.
Emergency Landing and Crash
Unable to maintain a safe altitude, the captain decided to attempt an emergency landing. The aircraft subsequently struck the bank of a river and crashed.
Casualties and Injuries
The mechanic was killed. Four other crew members sustained injuries, two of them seriously.
Probable Cause
The official investigation determined that the accident was caused by the failure of engine number one due to an overheating caused by an excessive use.