What was found
WITH APU RUNNING - ECS IN APU NOTED FUEL ODOR IN AFT CABIN IN LAV AREA. FURTHER INSPECTION FOUND ODOR TO BE MOST PRONOUNCED IN SMALL CABINET BELOW LAV CLOSET HOUSING AIRSHOW BOXES - A/C HAD APPROX 1600 LBS OF FUEL ON BOARD. NO FUEL ODOR FROM GASPERS. RAN APU FOR MORE THAN AN HOUR IN THE -APU- MODE ON THE ECS. VARIED TEMPERATURES FROM HOT TO COLD BUT NEVER SMELLED FUEL IN THE CABIN. OPS CHECK OF APU GOOD AT THIS TIME. GULFSTREAM G200 MM/49-00-00. NO FUEL NOTED BENEATH LAV CLOSETS AT THIS TIME. KLFT-KDTS