Hi Dick,
on the Classic 747, the autopilot/autothrottle is manually disengaged on rollout after an autoland. 2AP, and early 3AP aircraft must be disengaged on touchdown, later 3AP aircraft have full CAT 111 rollout capability. A 2AP (fail passive) aircraft is capable of autoland, but a single autopilot failure limits the aircraft to CAT 1 limits and a manual landing. A 3AP (fail active) aircraft can continue a full autoland after a single autopilot failure. Whether it is then restricted to CAT 11 limits depends on the individual aircraft, and the airline/crew limits (we only work Cat 11 anyway). If the autoland is u/s, the aircraft is limited to CAT 1. On autopilot disconnect, the Boeing manual (and my experience) suggests that the aircraft could 'be significantly out of pitch trim'. The later in the approach the disconnect happens, the more out of trim it will be. Obviously, on the ground the pitch trim is irrelevent. Hope this helps.