As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTER RUDDER 1/2 FAIL INDICATION AND WHEN RUNNING CHECK LIST FELT ABRUPT YAW WHEN SYSTEM TURNED OFF, DID NOT REENERGIZE RUDDER HYDRAULIC SYSTEM AND RETURNED TO STL. MAINTENANCE INSPECTED THE RUDDER INTERCONNECT RODS IN THE RUDDER AREA WITH NO DEFECT NOTED. REMOVED AND REPLACED RUDDER SYSTEM 2 PRESSURE SWITCH.