Originally Posted by
PPRuNe Towers
It's an entire system option Mac: AOA DIsagree is part of the AOA Indication package.
Can't vouch for MAX but on -800 it's possible to have AOA DISAGREE without AOA indication. NNC items are: 1. Airspeed errors and IAS DISAGREE alert may occur 2. Altimeter errors and ALT DISAGREE alert may occur. That's it.