What was found
BURNING SMELL COMING FROM AFT GALLEY. NO SMOKE SEEN BUT FUMES A RE STRONG RAN ALL AFT GALLEY APPLIANCES (COFFEEMAKER, OVENS, WARMERS). RAN APU WITH BOTH PACKS ON HIGH. NO SMELL DETECTED. INSPECTED AFT CARGO PIT AND APU COMPARTMENT. NO SMELL DETECTED. FA'S REPORT ODOR IN AFT GALLEY AFTER AC WAS AT GATE, ENGINE SHUT DOWN AND APU SHUT DOWN. ACCOMPLISHED FIM 21-00 TASK 830 WITH BOTH ENGINE AND APU RUNNING. RAN L AND R PACKS SYSTEM, BLEED AIR SYSTEM, HYD SYSTEMS,AND ALL GALLEY APPLIANCES. NO SMOKE OR FUMES NOTED DURING OR AFTER ENGINE SHUT DOWN. NO PRIOR LEG OR CURRENT EXISITING FAULTS.