As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2327: WHILE DESCENDING ON APPROACH AND OAT-2 DEG C, THE DE-ICE PRESSURE CAUTION LIGHT ILLUMINATED. AFTER SELECTING AIRFRAME MODE TO SLOW, THE NR 1 BOOT PAIR LIGHT ON FO'S SIDE WASN'T ILLUMINATED. RAN THE CHECKLIST AND THE DEICE LIGHT DIDN'T GO OUT BUT PRESSURES WERE NORMAL. MAINTENANCE REMOVED AND REPLACED NR 2 DUAL DISTRIBUTION VALVE AND INSTALLED LEADING EDGE 613AR. ALL CHECKS GOOD. NO DEFECTS NOTED. MTX CONTROL WAS NOTIFIED. AIRCRAFT RETURNED TO SERVICE.