As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THAT DURING PREFLIGHT INSPECTION, THERE WAS A STRONG ODOR OF FUEL IN THE COCKPIT. MX INSPECTED THE ENTIRE FUEL SYS IN ACFT AND IN THE HEATER. FOUND A LOOSE B-NUT IN LT WHEEL WELL WITH EVIDENT STAINS. B-NUT WAS TIGHTENED AND NO OTHER LEAKS WERE NOTED.