As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT UPON STARTING APU AT GATE AND TURNING ON PACK 2 THERE WAS STONG ODOR OF FUEL IN THE COCKPIT AND BACK TO ABOUT ROW 7. THE AIRCRAFT WAS REMOVED FROM SERVICE. CHECKED APU AND PACKS FOR LEAKS WITH NONE NOTED. FUEL ODOR DISSIPATED OVER TIME. OK FOR CONTINUED SERVICED. THE AIRCRAFT WAS RETURNED TO SERVICE.