I have the same issue. I can't get the A/T to follow the profile. Normally you can set your cruise target speed either by entering the cruise mach speed in the FMS and use VNAV, or bypass the FMS cruise speed by using the speed mach mode of the A/T.

Neither method work, and what happen is that the A/T is chasing it's displayed EPR (in green) and not the target speed. I tried switching on/off/on various automation (VNAV, A/T, Speed mode, FMS entry etc.) but the A/T always chase the EPR limit and not the target speed.


I also tried to put the trottle either in min/max and hitting F1 or F4 to syncronize, put less sensivity and more deadband in the throttle calibration, but it didnt change nothing. If the A/T is on it will always put the aircraft in overspeed

I am at loste here...