What was found
DURING TAKEOFF AND LANDING, ALSO TAXING, THERE IS A ''DETENT'' AT THE NORMAL POSITION OF RUDDER TRAVEL. IT TAKES EXCESSIVE PRESSURE TO MOVE RUDDER. NOTICED DURING BEGINNING OF TAKEOFF ROLL TO ROTATION AND DURING LANDING AT FLARE APROX 120 KTS. PERFORMED RUDDER HYDRAULIC SYSTEM DIFFERENTIAL PRESSURE TEST. OPS AND LEAK CHECK GOOD IAW 27-22-00. PERFORMED RUDDER CONTROL ELECTRICAL SYSTEM TEST. OPS CHECK GOOD IAW 27-24-00. REMOVED AND REPLACED RUDDER PRESSURE SWITCHES BLUE AND GREEN IAW 27-22-01. OPS AND LEAK CHECK GOOD.