B777 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 200; Flight Crew Total 20000; Flight Crew Type 400
Communication Breakdown
Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Other / Unknown
Flight Crew Became Reoriented
Human Factors
At the same time we were cleared to push; we received a message for inaccurate weights (third occurrence). I told the push crew that we needed to get new weights before we pushed. We got new weights; and loaded them into the FMC. When cleared to push; I released the brakes and said 'braked released cleared to push disconnect abeam gate XX.' We started moving; but no verbal response was heard from the push crew. After trying to contact on the headset; the aircraft stopped. I still thought we had a communication problem. One of the wing walkers got on the headset and told us there was no one in the tug.
B777 Captain reported receiving three messages for inaccurate weights with the push back crew standing by for push. After the weights were entered into the FMC; the Captain stated to the tug driver 'Brakes are released; cleared to push'. No response was received; but the aircraft started to move. Further attempts at communication were unsuccessful then the aircraft stopped. A wing walker came on the intercom and informed the flight crew that no one was in the tug when the aircraft started to move.