As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED AN ELECTRICAL BURNING SMELL COMING FROM ROW 4 DURING FLIGHT. THE AIRCRAFT LANDED WITHOUT INCIDENT AT ITS INTENDED DESTINATION, KPHL. MAINTENANCE FOUND THE LIGHT SOCKETS AT ROW 4, SEATS D AND F TO HAVE BURN MARKS. MAINTENANCE DISCONNECTED THE SIDEWALL LIGHT AT ROW 4DF AND DEFERRED THE LIGHT. CMH MAINTENANCE CLEARED THE DEFERRAL DURING OVERNIGHT MAINTENANCE BY CHANGING THE LIGHT SOCKET ASSEMBLY AT ROW 4. OPERATIONAL CHECKS OF THE LIGHT WERE GOOD WITH NO FURTHER DEFECTS NOTED.