What was found
FLIGHT ATTENDANT REPORTS FUEL SMELL IN CABIN. AFT CABIN HAD STRONGEST ODOR, SMELL. SMELL STARTED WITHIN ABOUT 10 MINUTES AFTER TAKEOFF. FLIGHT 3857 - FILED CLOSED PERFORMED INSPECTION OF THE APU AREA AND ENCLOSURE, OF BOTH ENGINE AREAS, UNDER THE CARGO PIT FLOOR BOARD, AND IN THE PACK AREA FOR ANY FUEL CONTAMINATION IN REF TO FIM. NO EVIDENCE OF FUEL CONTAMINATION INTO THE AIR SUPPLY SYSTEM. OPERATED THE PACKS OFF OF THE APU FOR 20 MINUTES AND OFF OF BOTH ENGINES FOR 20 MINUTES IN REF TO AMM. NO ABNORMAL SMELLS OR ODORS CAME FROM THE AIR CONDITIONING SYSTEM. PERFORMED FUEL LEAK CHECK AND VERIFIED NO FUEL SMELL AFTER SHUTDOWN OF THE ENGINES AND APU.