As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 3184 THE CREW REPORTED A STRONG FUEL SMELL WHEN THE APU WAS STARTED IN FLIGHT. THE APU WAS SHUT DOWN IMMEDIATELY. MAINTENANCE INSPECTED AND PERFORMED A OPERATIONAL CHECK OF THE APU AND NO DEFECTS WERE FOUND. THE AIRCRAFT WAS RELEASED FOR SERVICE.