Not a pilot, but angle of attack sensors are used with flight envelope protection systems in Airbus airliners (and probably newer Boeing planes too, though I'm

Not a pilot, but angle of attack sensors are used with flight envelope protection systems in Airbus airliners (and probably newer Boeing planes too, though I'm not sure). Take for instance this particular incident on an A321 aircraft [1]: "two angle of attack sensors having frozen in their positions during climb at an angle, that caused the fly by wire protection to assume the aircraft entered a stall while it climbed through FL310. The Alpha Protection activated forcing the aircraft to pitch down, which could not be corrected even by full back stick input. The crew eventually disconnected the related Air Data Units and was able to recover the aircraft.". A321 have three AoA sensors, so if two freeze in the same wrong position, they outvote the good sensor... [1] https://avherald.com/h?article=47d74074 https://avherald.com/h?article=47d74074 EDIT: incomplete citation