L-1011 Autoflight: Two Independet Autopilots (22-6)

The autoflight system contains two independent dual-channel autopilot/flight director computers that are always on and synchronized with the aircraft attitude. An autopilot/flight director system engage panel, located in the center of the pilot's glareshield, is used to engage either a flight director, an autopilot servo or both with the autopilot/flight director computers. The autopilot/flight director system engage panel is effectively divided in half. The left side is for autopilot A and the right side is for autopilot B.