Tio Pablo
How is "Use Manual Trim Only" a Protection? It is a command. BUT, theoretically, it is unneeded for even STALL recovery if zeroed. Elevators are enough. It is a command also to CHECK THS' deflection, and zero it immediately? So, if THS is not necessary for Manual flight, (IT should not be- per certification?) How is THS allowed (commanded) to deploy to max NU in less than NORMAL LAW? And if in other than NORMAL, shouldn't the return to zero be auto as well? Remember, if PF needs its authority, it is available? "Use THS with Caution, Roll Direct, Pitch not protected")
Perhaps, rather than a big red Button to DIRECT, the button should be to ut back neutral the THS. Would not that have been enough in 447' case?
bear