The jetliner left its boarding gate at Beijing Capital International Airport at 20:22 and took off at 20:37 local time (12:37 UTC) from Runway 36R. At 21:20, as the aircraft neared Dalian, the captain reported "fire in cabin" and "the tail is on fire" to Dalian tower and requested an emergency landing. At 21:24 the aircraft disappeared from the radar screen and lost contact with air traffic control. It was due to arrive in Dalian at 21:40. The aircraft crashed in the water at a 90 degree bank angle and 30 degree nose down pitch. Witnesses stated that the aircraft made several circles before suddenly plunging into the sea with its light out.