As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL BURNING SMELL NOTICED BY F/A AND GROUND CREW WHEN A/C PARKED ON GROUND MORE MID CABIN TO GALLEY. FOUND AFT LIGHT SOCKET ABOVE 17-AB BURNED ITEM DEFERRED IAW MEL NR 33-2 AUTH, NR 070229-C. CAT "C" WAITING FOR COMPLETION OF MEL FOR FURTHER DETAILS. R & R LIGHT UPPER SOCKET IAW WIRING MANUAL, STANDARD PRACTICE 20-45-10 MEL RESTORED.