The bad AoA probe can cause IAS disagree, according to the FAA Emergency Airworthyness Directive: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgad.nsf/0

The bad AoA probe can cause IAS disagree, according to the FAA Emergency Airworthyness Directive: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgad.nsf/0/83ec7f95f3e5bfbd8625833e0070a070/$FILE/2018-23-51_Emergency.pdf http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgad.nsf/... Take a look at the graphs from the LionAir crash: http://nrg.cs.ucl.ac.uk/mjh/lionair.png http://nrg.cs.ucl.ac.uk/mjh/lionair.png You can see that both airspeed and altitude misread, in addition to AoA. If I understand correctly, the AoA is used by the ADIRU to correct misreading of the static pressure measured by the pitot-static tubes at high angles of attack. Thus one bad AoA probe can cause lots of symptoms simultaneously.