As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN FILLED WITH SMOKE AFTER STARTING APU. FOUND APU OVER SERVICED WITH OIL VENTING INTO EXHAUST. DESERVICED AND SERVICED IAW MM 12-11-03. RAN APU OPS CHECKS GOOD. REMOVED AND REPLACED CONDENSER SOCK IAW MM 21-50-00 OPS AND LEAK CHECKS GOOD. NO SMOKE OR ODOR OF OIL NOTED IN CABIN ON POST RUN.