Originally Posted by
megan
Idle is not referring to N1, but fuel flow. The throttle may be at idle as indicated by bolding.
Once again you need to read and understand what is going on.
The limiting factor is the egt. The power lever is reduced to maintain a maximum of 750lbs per hour. The compressor speed would be at its maximum hence the higher egt. In this state the engine is not in idle. Its no where near idle. Only the flow fuel is near idle. The fcu will maintain compressor speed to the set figque. The engine has no more fuel to give due to the air ratio to continue to climb or maintain operation above this flight level. Idle speed is a factor of compressor speed and not wf. Wf on the ground and prefromance runs is a factor of compressor speed and must be within it graph for compressor speed to wf.
The engine is not in an idle condition due to the speed of the compressor. The engine would not be consided as in idle.