What was found
UPON OPENING THE L1 DOOR ARRIVAL, THE TWO FWD FLIGHT ATTENDANTS, MYSELF & THE FIRST OFFICER SMELLED A FAINT FUEL SMELL, WHICH WE ASSUMED CAME FROM OUTSIDE. LATER DETERMINED THE SMELL WAS COMING FROM OUR VENTS VIA APU AIR. IMMEDIATELY SHUT THE APU AIR OFF & PACKS OFF. ALL APU COCKPIT INDICATIONS WERE NORMAL, DISCOVERED FUEL LEAKING FROM APU NON-RAM DOOR. FOUND LARGE FUEL LEAK COMING FROM APU FUEL CONTROL, BLOWN OUT GASKET VISIBLE UPON INSPECTION. R & R APU FUEL CONTROL. LEAK & OPERATIONS CHECKED GOOD IAW AMM 49-30-01. COMPLIED WITH WORK CARD 21-059-008 & PACK BURNOUT PROCEDURES & WORK CARD 21-059-002.