As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - ON FLIGHT NUMBER 2092, ON TAKEOFF ROLL AFTER POWER WAS APPLIED AT ABOUT 50 KIAS, THE RUD FULL PRESSURE CAUTION LIGHT ILLUMINATED. THE LIGHT HAD EXTINGUISHED WHEN THE TAKEOFF WAS ABORTED. REMOVED AND REPLACED NR 2 RUD FULL PRESSURE SWITCH ON THE RUDDER DUAL PRESSURE REGULATOR. OPERATIONAL CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.