What was found
DURING DESCENT, RUDDER REQUIRED FULL NOSE LEFT RUDDER TRIM TRAVEL TO STOP. RUDDER TRIM INEFFECTIVE. PERFORMED RUDDER ACT HEALTH CHECK, AND PCU CHECK IAW EMB 120 MM 27-22-00. FOUND GREEN RUDDER ACTUATOR TO FAIL. REMOVED AND REPLACED GREEN RUDDER ACTUATOR WITH A SERVICEABLE PART. CHECKED OPERATION OF RUDDER AND RUDDER TRIM SATISFACTORY REF EMB MM 27-22-02. P/N ON: 308140-1003, S/N ON: 00026, S/N OFF 0650. PERFORMED OPS CHECK ON RUDDER AND RUDDER TRIM. WITH AUTOPILOT YAW ENGAGED SEEMS TO OPERATE A LITTLE SLOW USING RUDDER TRIM WHEEL. ALL OTHER FUNCTIONS OPERATE NORMAL. REPLACED RUDDER SERVO IAW MM 22-10-00, OPS CHECK GOOD. P/N ON: 622-5734-002, S/N ON: 1604, S/N OFF: 7835.