Shop of the Minsk Aircraft Repair Plant. An aircraft is delivered to the workshop on rails. Aircraft in the shop of the plant. Test engineer Yu. V. Kuznetsov examines the cabin of the aircraft, climbs the wing, looks at the engine, instruments. Yu. V. Kuznetsov and the pilots in the cockpit during the test. The story of the pilot about the elimination of the aircraft malfunction by Yu. V. Kuznetsov in the air, during the flight.