What was found
ON CLIMB OUT RUDDER TRIM WAS REQUIRED WHILE HAND FLYING... RUDER TRIM WENT FULL RIGHT UNABLE TO MANUALLY ADJUST TRIM. AUTO PILOT OFF/ YAW DISC PER QRH RETURNED TO SLC USING ALMOST FULL RIGHT RUDDER PRESSURE TO CORRECT. (FLIGHT 3282 FILED CLOSED)CONFIRMED WITH CAPT. THAT RUDDER TRIM KNOB ON AIL/RUD TRIM PANEL WAS STUCK. INDUCING TRIM RUNAWAY. REMOVED AND REPLACED AIL/RUD TRIM CONTROL PANEL WITH A SERVICEABLE PANEL. AIL/RUD TRIM OPERATES NORMALLY. RUDDER AUTHORITY IS NORMAL AND INDICATES NORMAL POSITION. PERFORMED OPERATIONAL TEST OF THE AUTOPILOT. NO FAULTS NOTED. REF CRJ 22-11-00 AND 27-12-10.