Hi, in every long haul flight I have attempted in this aircraft at some point in the flight, sometimes multiple times, the throttle cuts out kicking off the auto throttle and the autopilot. To recover i then have to turn off STBY L, Centre L and STBY R fuel pumps and turn them back on again and the engines then restart without moving the engine cutoff switches or ignition. This is the only big problem I have woth the aircraft and it really get on my nerves that it happens multiple times on very flight.