Autopilot disconnection protocol
A paper suggests that a new protocol for sudden autopilot disconnection (as opposed to e.g. more pilot training) might have averted some high-profile accidents.
If, for some reason the autopilot fails to do what the pilot expects it to do, or disengages without good reason, then the switch-over by the pilot to hand flying should be seamless and without raising a sweat.
Mostly that doesn't happen because an autopilot unexpected disengagement is usually followed by frantic attempts at re-engagement followed by heads down button pushing. Addiction to automatics is often almost incurable. It can be likened to addiction to nicotene. Both addictions have the potential to cause eventual grief.