What happened
The incident involved an airplane that was conducting an operation in western Russia. Following the completion of this activity, the aircraft attempted to return to its home base. However, it failed to make contact or arrive at the designated location. The plane subsequently vanished and remains lost without any trace. No wreckage or debris has been located, and there is no further information regarding the status of the crew or passengers.
Findings
The source material does not provide specific details on contributing factors or official conclusions. The primary fact established is that the aircraft was never recovered and its exact cause of loss remains undetermined based on the available text.