As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU MAINT BLUE LITE CAME ON DURING START. GROUNDED - YES. ACCOMPLISHED FIM 49-90 TASK 804. PERFORMED APU BITE CK FOUND FAULT 49-91227 OIL QTY LOW. CKD APU OIL SIGHT GLASS QTY LOW. ADDED 1.5 QTS REF AMM 12-13-31-610-803. RAN APU BLUE LIGHT OFF.