757 & 767 have roll out guidance servos x 3 fitted to rudder. (In single autopilot flight, turn coordination is provided by yaw damper, not a separate rudder channel. Steering commands go to the roll channel).
The LOC active mode provides aileron commands to acquire and track the centerline of the localizer beam during all phases of single or multi-channel ILS approach. The A/P yaw channel provides rudder commands during multi-channel approaches to maintain runway alignment during rollout.
Yaw axis control functions provide directional control of the airplane during an autopilot dual or triple channel engaged controlled touchdown and rollout. During an ILS approach with two or three autopilots engaged, an FCC directional control module aligns the airplane on the centerline prior to touchdown and maintains the airplane on runway centerline after touchdown. During high speed rollout, the rudder is used for steering. Through an interconnect with the rudder pedals, nose wheel steering is used during low speed rollout.
Dis-engaged at A/P disconnect.