Originally Posted by
hans brinker
Okay, didn't read your post accurately, because of the way you phrased it. What you should be asking is: "Where are the AP servos located".
For MD-11 elevator hydraulic actuators are in the horizontal stab. Control is divided between the two flight control computers with FCC-1 driving right outboard and left inboard and FCC-2 driving right inboard and left outboard elevators. FCC control input drives the actuator mod pistons and feedback of mod and ram piston positions is provided electrically to the FCC.
I would expect DC-10 to be similar architecture except that the two MD-11 digital FCC are replaced by analog pitch and roll computers.