As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT THE GATE STARTED APU AND AFTER RIGHT PACK TURNED ON, FUEL FUMES CAME INTO CABIN AND FUEL DRIPPING UNDERNEATH APU. REMOVED AND REPLACED APU FCU AND SEQUENCE OIL PRESSURE SWITCH, WORK PERFORMED IAW AMM 49-30-01 AND 49-30-03. OPS AND LEAK CHECK GOOD.