What was found
PICKED UP THE HELICOPTER IN A HOVER FOR A MAINTENANCE CHECK FLIGHT AND HOVERED OVER TO THE GRASS AREA BETWEEN THE RAMP AND TAXI WAY, CHECKED FLIGHT CONTROLS FOR NORMAL MOVEMENT AND THEN HOVERED TAXIED TO THE RUNWAY FOR A NORMAL DEPARTURE. MADE A LEFT TURN FOR A LEFT CROSSWIND WITH NO ISSUE, THEN TRIED TO TURN LEFT FOR A LEFT DOWNWIND . WAS UNABLE TO MOVE THE CYCLIC LEFT MORE THAN A HALF INCH. NEUTRALIZED THE CONTROLS, AND WAS ABLE TO MOVE THE CYCLIC RIGHT, FORWARD, AND AFT. DEPRESSED THE FORCE TRIM RELEASE AND WAS STILL UNABLE TO MOVE THE CYCLIC LEFT MORE THAN A HALF INCH. AFTER LANDING AND SHUTDOWN MAINTENANCE CONFIRMED THE SERVO WAS STICKING, ABLE TO FREE IT UP AND THEN IT WOULD MOVE LEFT.