"Cockpit voice and flight data recorders revealed the presence of the
pilot's 12-year-old daughter and 16-year-old son on the flight deck. One of
the children had unknowingly disabled the A310 autopilot's control of the
aircraft's ailerons while seated at the controls. The aircraft had then
rolled into a steep bank and near-vertical dive from which the pilots were
unable to regain control." https://en.wikipedia.org/wiki/Aeroflot_Flight_593