Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 85; Flight Crew Total 22000; Flight Crew Type 2000
Situational Awareness; Human-Machine Interface
Aircraft Equipment Problem Less Severe
Flight Crew Returned To Gate
Aircraft; Human Factors
During takeoff roll; the Captain advanced the throttles and selected the takeoff button to get takeoff thrust. The power advanced; but at a very slow rate. The thrust would not advance to take-off thrust. The Captain selected the thrust button again with no change in thrust. We aborted take-off at approximately 135 knots. The aircraft was safely stopped on the runway and returned to the gate without incident.
Upon throttle up and engine stabilization CA pressed TOGA buttons for autothrottle engagement per SOP. Autothrottles did not engage. CA moved throttles further forward and pressed TOGA again and no autothrottle. By then we had moved approximately 2;000 feet down runway and it was blowing snow conditions. Engines did not develop more than 50% power. CA aborted Takeoff at 135 knots IAS.
B777 crew describe a rejected takeoff at 135 knots when autothrust would not engage.