Originally Posted by
tdracer
However, MCAS failed because AOA was bad, which drove multiple related faults such as stick shaker, bad airspeed, and unexpected stab trim to due to MCAS - suddenly a complex and confusing combination of faults that could overwhelm a crew (and the lack of information and training just made it worse). Suddenly a no-big-deal MCAS problem is potentially catastrophic.
Did MCAS fail? I would rather think it worked as designed but on the basis of wrong data/information originated by the AOA.