3 ms·

AFAIK the AOA disagree alert was an optional add-on sold by Boeing! https://qz.com/1608362/boeing-says-it-didnt-deactivate-standalone-aoa-safety-alert https://

• toast0 6y ago
  Sure, but without knowledge of MCAS, what would a pilot do with an AOA warning? They would still most likely get an airspeed disagree warning (standard) because AOA is a parameter in the airspeed calculation. Again, they wouldn't know that was why the stabilizer trim kept moving to nose down, because the MCAS system was not disclosed to pilots.