What was found
DURING GROUND OPS, AFTER SELECTING PACK ONE AND 3 ON (WITH APU RUNNING), COCKPIT FILLED WITH THE ODOR OF RAW JET FUEL. NOT THE ODOR OF JET EXHAUST. PACKS WERE TURNED OFF AND COCKPIT WAS VENTILATED. FOUND APU LEAKING FUEL INTO APU INLET. SHUTDOWN APU AND CONNECTED HUFFER, ODOR WENT AWAY. PACK SYS OPS CHECKS NORMAL.