As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STARTED APU ON APPROACH AND AFTER APU WAS RUNNING OBSERVED STRONG FUEL ODOR IN COCKPIT, TURNED OFF APU AND ODOR DISAPPAITED. RAN APU, NO FUEL, OR OIL LEAKS. OPERATED THE NR 1 PACK AND FOUND NO FUEL ODOR. SAME FOR THE NR 2 PACK. IAW AMM 21-51-00.