As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - PITCH TRIM AND NR 2 RUDDER HYDRAULIC CAUTION LIGHT ILLUMINATED ON TAXI. MAINTENANCE PERFORMED THE FAULT ISOLATION PROCEDURE PER 27-20-00-810-805. NO FAULTS WERE PRESENT. DH8-400-SL-27-003 WAS PERFORMED. NO FAULTS NOTED. CAUTION LIGHTS EXTINGUISHED PER PROCEDURE. AIRCRAFT RETURNED TO SERVICE.