In the 737, aileron trim or rudder moves the neutral position via the feel & centering mechanism.
What if you can't center them? Usually you attempt this using the same switch that malfunctioned.
Pulling the CBs I think just prevents further movement (if not already reached an extreme position). In this case, can you overpower the forces imposed by the runaway trim?
Last edited by David36; 13th Jan 2013 at 16:40.