The real solution would be to inhibit trim if the AoA vanes disagreed. This is typically the policy for stick shakers and stick pushers.
My guess is they justified this policy because:
-the trim wheel is obviously moving, so a pilot will recognize this as a runaway trim (and perform correct memory items to disable trim)
-the system will only activate when flaps are retracted. So when the plane starts doing something wrong (nose down), the pilot will undo the last thing they changed (flaps), which prevents further nose down trim
The real solution would be to inhibit trim if the AoA vanes disagreed. This is typically the policy for stick shakers and stick pushers.
My guess is they justified this policy because:
-the trim wheel is obviously moving, so a pilot will recognize this as a runaway trim (and perform correct memory items to disable trim)
-the system will only activate when flaps are retracted. So when the plane starts doing something wrong (nose down), the pilot will undo the last thing they changed (flaps), which prevents further nose down trim