What was found
IN LEVEL CRUISE FL250, POWER REDUCED AND RT RUDDER APPLIED. RUDDER PEDAL DEFLECTED A SMALL DISTANCE AND THEN STOPPED. FELT LIKE A LIMIT TO TRAVEL. PFCS SHOWED ABOUT A HALF A NEEDLE WIDTH OF DEFLECTION. RUDDER TRIM FELT LIKE IT WAS WORKING PROPERLY. CREW TRIED TO MOVE THE RUDDER & FELT THE LIMIT. RT & LT SIDES HAD SAME LIMIT RESULTS. CAPTAIN APPLIED PRESSURE TO RT RUDDER PEDAL UNTIL THERE WAS A PHYSICAL RELEASE & LARGE YAW OF ACFT. AFTER CENTERING RUDDER PEDALS, PRESSURE WAS AGAIN APPLIED AND LIMIT WAS FELT AGAIN. DURING APPROACH LIMIT TO RUDDER TRAVEL WAS GONE AT 7000'/200KIAS/-21C. RUDDER OPERATED SMOOTHLY FOR REMAINDER OF FLIGHT & DURING TAXI. REMOVED RUDDER FEEL & SUMMING UNIT IAW AMM TASK 27-22-06-000-801. INSTALLED IAW TASK 27-22-06-400-801. PERFORMED FREEDOM OF MOVEMENT CHECK OF RUDDER SYS ENSURING FULL TRAVEL AND VERIFIED PROPER DIRECTION OF MOVEMENT. NO DEFECTS NOTED. OPS CHECKED GOOD. OCF FLIGHT GOOD. RETURNED TO SERVICE.