As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PREPARING TO DEPART KDTW FOR KSLT ON FLIGHT 2362, THE FLIGHT CREW BOARDED THE PASSENGERS WITH GROUND POWER AND AIR CONNECTED. WHEN THE APU WAS STARTED, A STRONG FUEL ODOR FILLED THE COCKPIT AND CABIN. THE FLIGHT CREW SHUT DOWN THE APU. MAINTENANCE INSPECTED THE APU AND FOUND A CHAFED FUEL LINE. THE APU WAS DEFERRED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.