Originally Posted by
spornrad
Thanks for your explanations. Since it would be another lottery win the thumb switch going south at that exact instance (besides why less, not no stab movement): Is there any remote possibility that software reduces the thumb switch authority on the left, not right, in those conditions (AOA disagree/MCAS activation) ?
Not particularly remote since it was the left side that the shaker was active on. We don't really know how the thumb switches operate, at first I thought that they were just switches to a solenoid but it seems more likely that they are just inputs to the fancy two computer/four processor 'black box' that is part of the flight control system. At that point, anything is possible since it is software.