As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, A PASSENGER SPILLED A LARGE AMOUNT OF WATER ON THE ARMREST OF SEAT 10JK. THEN, DURING THE DEPLANING OF PASSENGERS, THE ARMREST STARTED EMITTING A SMALL AMOUNT OF WHITE SMOKE. FLIGHT ATTENDANT USED HALON FIRE EXTINGUISHER ON ARMREST AND SMOKING CEASED. MAINTENANCE REPLACED VIDEO CONSOLE, THE SEAT ELECTRICAL BOX AND THE UNDERSEAT ELECTRICAL BOX. OPERATIONAL CHECK OK.