As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLIGHT 2173 - THE FLIGHT RETURNED TO FIELD WHEN AFTER TAKE-OFF, THE CREW RECEIVED A RUDDER FULL PRESSURE CAUTION LIGHT, NR 1 RUDDER HYDRAULIC CAUTION LIGHT, AND RUDDER PRESSURE CAUTION. MAINTENANCE INSPECTED THE AIRCRAFT AND REPLACED THE RUDDER DUAL PRESSURE REGULATOR. OPERATIONAL CHECKS WERE GOOD AND THE AIRCRAFT WAS RETURNED TO SERVICE.