What was found
DURING CRUISE FLT, FLT ATTENDENTS REPORTED A BURNING ODOR NEAR SEAT 45 ABC, TURNED OFF LIGHTS AND LOOKED FOR SOURCE, COULD NOT LOCATE THE SOURCE, BUT ODOR WENT AWAY. ONE HOUR LATER THE ODOR CAME BACK APROXIMATELY 5 MINUTES THEN WENT AWAY. PERFORMED FUME AND SMOKE INSPECTION IN CABIN FWD & AFT, ROW 45ABC , OVERHEAD LIGHTS AND BALLAST, PAX READING LIGHTS, PSU LIGHTS, IFE MONITORS AND POWER OUTLETS IAW AMM 21-72. AFT CARGO & APU ECU. IFE COMP INSPECTED. CREW RAN BOTH ENGINES INDEPENDENTLY, RECIRCULATION FANS & PACKS ON, NO ODOR WAS NOTED IN CABIN.