What was found
CREW REPORTED THAT THERE WAS A BURNING ODOR IN THE CABIN, DURING FLIGHT AROUND ROW 5. CREW TURNED BOTH PACK SYSTEMS AND THE RECIRCULATION FAN OFF AND THE ODOR DISSIPATED. THE FLIGHT LANDED NORMALLY WITHOUT INCIDENT. MAINTENANCE INSPECTED ALL LIGHTING BALLASTS WITH NO DEFECTS NOTED. THE PACK SYSTEMS AND DUCTS WERE INSPECTED WITH NO DEFECTS. MAINTENANCE THEN PERFORMED ENGINE RUNS WITH ALL BLEEDS AND PACKS ACTIVATED. THE ODOR COULD NOT BE DUPLICATED AND THE ACFT WAS FOUND SATISFACTORY FOR SERVICE.