B777 crew describe a rejected takeoff at 135 knots when autothrust would not engage.

Attributes
ACN	1230602
Time
Date	201501
Local Time Of Day	0001-0600
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Component
Aircraft Component	Autothrottle/Speed Control
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 85 Flight Crew Total 22000 Flight Crew Type 2000
Person 2
Function	First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

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.

Original NASA ASRS Text

Title: B777 crew describe a rejected takeoff at 135 knots when autothrust would not engage.

Narrative: 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.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.