What happened
While operating in flight, the aircraft suffered a simultaneous loss of power in both engines. This failure was triggered by the depletion of available fuel during the mission. In response to the loss of propulsion, the crew initiated an emergency descent and successfully navigated the aircraft to a landing site located in a prairie area near Lineynoye.
Although the impact resulted in the aircraft being damaged beyond repair, there were no casualties among the occupants. The landing was completed without any reported injuries to the crew.
Findings
Investigations into the incident revealed that the engine failure was a direct result of fuel exhaustion. It was discovered that following a recent refueling procedure, the crew failed to secure the fuel filler cap correctly. This oversight allowed fuel to leak from the tanks throughout the duration of the flight, eventually leaving the engines without sufficient propellant to maintain operation.