Aircraft Crash Near Urakhcha Due to Engine Failure and Loss of Control (CCCP-75866)

Incident Overview and Initial Failure During cruise at an altitude of 7,500 meters, engine number four failed. The crew was unable to determine which of the right engines had failed, so they shut down both right engines and feathered both propellers. This action resulted in a loss of control, causing the airplane to bank right and enter a dive. The aircraft reached a rate of descent of 1,800 meters per minute (30 meters per second). The ailerons were sheared off during the incident. After passing through the last cloud layer at an altitude of 200 meters, the crew attempted to regain control, but the airplane struck the ground at a speed of 650 km/h. The crash occurred in a snow-covered field located 3.5 km southeast of Urakhcha. The aircraft disintegrated on impact, with debris scattered over an area 250 meters wide and 800 meters long. Both right engines were found 600 meters away from the point of impact, and elements of the ailerons were found approximately 12 km from the crash site. It was determined that both right engines were not running at impact, while both left engines were turning at full power. The accident was not survivable.