What was found
(CAN) DURING GRD CHECKS AT IDLE & FLIGHT IDLE, CYCLIC CONTROL MOVING UNCOMMANDED LT & FORWARD. CYCLIC CONTROL WOULD CONTACT STOP, AFTER 1-2 SECONDS IT COULD BE BROUGHT BACK TO CENTER POSITION & APPEARED NORMAL. MOVEMENT COULD BE DUPLICATED ON SUBSEQUENT RUNS, FORWARD & LT UNCOMMANDED & WITH SUBSTANTIAL FORCE REQUIRED TO HOLD CYCLIC IN NEUTRAL POSITION. AFTER TROUBLESHOOTING & WITH STAFF PRESENT, IT WAS DETERMINED ONE LATERAL HYD SERVO WAS CAUSING LT FWD MOVEMENT ON CYCLIC CONTROL. BOTH LATERAL SERVO'S REPLACED WITH REPAIRED UNITS. THIS CAUSED AN AFT & RT MOVEMENT ON CYCLIC. FINAL FIX WAS TO REPLACE RT SERVO ONLY & REINSTALL ORIGINAL LT SERVO. SUBSEQUENT RUNS ACHIEVED NO UNCOMMANDED MOVEMENTS LT OR RT.