Frozen pitot tubes causing an airspeed disagree is something we train for. The issue there isn't software, it's mechanical, and what the Airbus did is exactly w

Frozen pitot tubes causing an airspeed disagree is something we train for. The issue there isn't software, it's mechanical, and what the Airbus did is exactly what it's supposed to do according to the manual. The problem there was the junior co-pilot responding all wrong and the other pilot not noticing because Airbus sticks don't move together. The captain woke up, came to check and realized what was wrong but did so too late to fix it.