1 vs 3
Airbus - 3 sensors - more cost - but a far more reliable quorum.
Boeing - 1 sensor - cheap - Donald Ducked.
When my car window had a short-out the polarity (hot-cold) of my heater controls was reversed. Weird things can happen when electrical parts go bad.
When one goes bad out of a pair then it's hard to know which is right. That's why you need 3 of them.
The same is true of piezo speed sensors (Air France from Brazil icing).
Loving all the comments.
Biting the hand that feeds IT
