What was found
IAH - FLIGHT 2337, THE CREW REPORTED, SMELLED FUEL AFTER T/O WITH THE APU RUNNING BLEEDS AND AGAIN AFTER STARTING THE APU UPON PARKING AT IAH. THE AIRCRAFT LANDED AT IAH WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE APU FUEL CONTROL LINE, OPERATIONALLY AND LEAK CHECKED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.