Originally Posted by
Ian W
The statements made by Boeing are that the inputs from both AOA are now used and MCAS failed if AOA disagree. It is not just a software fix.
Just because it uses both doesn't mean it is a hardware fix. Both AOA signals were going into the flight computer already, it just was looking at one at a time, taking turns per flight. Now it takes both simultaneously, compares them against each other and disables MCAS if the disagree is too big. All software AFAICT.