As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CRUISE, FLIGHT CREW OBSERVED WHAT APPEARED TO BE WHITE SMOKE EMANATING FROM READING LIGHT (PSU) PANEL ASSEMBLY ABOVE SEAT 30 AB. CREW SWITCHED OFF READING LIGHTS AND SMOKE STOPPED. ON ARRIVAL TO THE STATION, MAINTENANCE FOUND ONE TRANSFORMER PRINTED CIRCUIT BORD SEVERELY OVERHEATED. POWER SUPPLY REPLACED AND SYSTEM TESTED SERVICEABLE. (TC NR 20070313003)