What was found
DURING FLIGHT, FUEL VALVE LIGHT ILLUMINATED FOR APU. FLIGHT ATTENDANT AT L5 DOOR NOTICED A FUEL SMELL. UPON LANDING, THE FUEL VALVE WAS LOCKED OUT. THE ITEM WAS DEFERRED PER DDPG. RETURN FLIGHT TO MIAMI, NO FUEL SMELL WAS NOTICED. ON ARRIVAL AT JFK, INSPECTION CHECKED APU FUEL SHROUD FOR LEAKS, NONE FOUND. MAINTENANCE REPLACED FUEL VALVE ACTUATOR. OPS CHECK AND LEAK CHECK OK. AIRCRAFT RETURNED TO SERVICE. (X)