As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 779 JFK-MBJ, ELECTRICAL BURNING SMELL REPORTED IN AFT CABIN FROM GALLEY FWD TO ROW 22. NOTICED BY INFLIGHT AND CUSTOMER. STRONG ODOR FOR APPROX 4 MINS THEN BECAME LESS FOR THE REMAINDER OF THE FLIGHT. PERFORMED BURNING SMELL INSPECTION AS PER TSM 24-00-00-810-823 AND TSM 23-39-00-810-801. REPLACED 23LH XEB DUE BURNT CONNECTOR, ALSO REPLACED SEAT TO SEAT CABLE.