As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 2533, THE CREW REPORTED THAT THE APU CAUSES FUEL SMELL IN THE CABIN AND COCKPIT. MAINTENANCE PLACED THE APU ON MEL 49-00-00 CAT-C CTL NR 134748, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. IN BNA, MAINTENANCE TIGHTENED LOOSE FUEL LINE AT APU FUEL CONTROL IAW VCMM HAM SUN 49-32-01 MM. OPS CHECK AND LEAK CHECK GOOD.