As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BLUE MAINT LIGHT FOR APU ILLUMINATED AFTER APU START AND REMAINED ON. ACFT GROUNDED. CHECKED APU OIL QUANITY IAW AMM 12-13-31. OIL QUANTITY CHECKED GOOD. PERFORMED APU BITE CHECK IAW FIM TASK 49-60-810-801. NO CURRENT FAULT FOUND. RESTARTED APU MAINT LIGHT EXTINGUISHED. ACCOMPLISHED FIM 49-60-801. NO FAULTS. STARTED APU. OPS CHECKED GOOD.