Originally Posted by Richard Spandit
This has caused some trainers at my airline to scratch their heads a bit as they were under the impression that the autothrottle system would not drive to this manually set reference, but it clearly did on a flight the other day where we tried it.
Any pointer? The systems manual is useless (although haven't checked the old, more useful one)
Dont know why they are confused, you have asked the Auto throttle to set a commanded EPR by pressing the EPR button. By pulling the manual selection knob you have also selected the EPR you would like the auto thrust to set.
Any selection of Autothrust mode or speed mode will cancel Vnav Path (except just opening the speed window on some models). When no pich mode has been selected (ie FLTCHG) VS becomes the default pitch mode.