As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG ODOR OF FUEL NOTICED IN CABIN, HELL HOLE, AND APU EXHAUST. ODOR NOTICED WITH A APU RUNNING WITH APU OFF. T/S APU FUEL SYSTEM AND APU SMELL. RAN APU. FOUND NO ABNORMAL APU EXHAUST ODOR. REMOVED APU INSPECTION PLATES. FOUND B-NUT LOOSE ON APU MAIN FUEL NOZZLE LINE. TIGHTENED FUEL LINE B-NUT. NO LEAKS NOTED AT THIS TIME IAW CE 560 M/M 20-10-06.