What was found
RNO - WHEN PULLING POWER TOWARDS IDLE ON DESCENT AND ADDING THE REQUIRED LEFT RUDDER AT ABOUT 1-1 1/2 INCH TRAVEL THERE IS AN INCREASE IN PEDAL RESISTANCE FOR APPROXIMATELY THE SAME DISTANCE AND THEN AN ABRUPT RELEASE IN PRESSURE REQUIRED FOLLOWED BY NORMAL TRAVEL. UNEVENTFUL LANDING. FERRIED RNO-PDX FOR REPAIRS. DISCREPANCY IS ASSOCIATED TO RUDDER FEEL/SUMMING UNIT. REPLACED RUDDER FEEL SUMMING UNIT IAW AMM TASKS 27-22-06-000-801 AND 27-22-06-400-80. ALL CHECKS GOOD. NO DEFECTS NOTED. C/W FREEDOM OF MOVEMENT CHECK, ENSURED FULL TRAVEL AND VERIFIED DIRECTION OF MOVEMENT, NO DEFECTS NOTED. RETURNED TO SERVICE.