Originally Posted by
Just the fax maam
With respect, we do not know with any certainty that there was no manual ANU input without corresponding stab movement.
True, there is very little that we can be absolutely sure about.
But your proposition requires that
a) the trim motor was stalled due to aerodynamic forces; and
b) simultaneously there was an unrelated software/processor issue that prevented the pilots' trim inputs from being recorded on the FDR
As opposed to the stab not moving simply because the pilots hadn't commanded it to.
Occam again ...