Now it's crystal clear! Just out of interest, what would happen if you set the thrust levers to a limit that meant the A/THR could not maintain the speed. For example, the aircraft is descending in "open decent" and the THR levers are at IDLE. When the aircraft levels, would the speed decay, until some sort of flight envelope protection takes over, or would the A/THR exceed the commanded limit in order to preserve the speed?