As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPPER POWER RECEPTACLE AT SEAT 12AB THREW SPARKS WHEN PAX`S ADAPTER WAS PLUGGED IN. ADAPTER THEN SMELLED LIKE FRIED ELEC. INSPECTED SEATS 12AB & FOUND NO EVIDENCE OF SPARKS. PERFORMED OPERATIONAL CHECK OF POWER PORT ISPS SYS IAW MM 25-25-65-720-801. SYS CHECKED NORMAL.