As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PASSENGER NOTICED A SPARK AND SMOKE IN THE UPPER FWD AREA OF THE CABIN HEADLINER. PILOT WAS NOTIFIED AND PILOT DISENGAGED CIRCUIT BREAKER FOR THE LIGHTS. AIRCRAFT LANDED WITHOUT INCIDENT. UPON REMOVAL OF HEADLINER AND LIGHT STRIPS, VISUALLY INSPECTED AND FOUND LIGHT STRIP CIRCUIT BOARD WAS BURNED AND CHARRED DUE TO EXCESSIVE HEAT, LIGHT TRACK WAS DEFORMED, THERMAL PLASTIC AT ENDS OF LIGHTS WERE MELTED, AND ONE OF THE 28VDC POWER LEAD WIRES WAS PULLED OUT OF THE CIRCUIT BOARD.