[sgerenser]

Air France 447: https://en.m.wikipedia.org/wiki/Air_France_Flight_447

Inputs were averaged, but supposedly there’s at least a warning: Confused, Bonin exclaimed, "I don't have control of the airplane any more now", and two seconds later, "I don't have control of the airplane at all!"[42] Robert responded to this by saying, "controls to the left", and took over control of the aircraft.[84][44] He pushed his side-stick forward to lower the nose and recover from the stall; however, Bonin was still pulling his side-stick back. The inputs cancelled each other out and triggered an audible "dual input" warning.