As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APU START "MAINT" LIGHT ILLUMINATED. ACCOMPLISHED FIM 49 60 TASK 801 APU BITE PROCEDURE CURRENT STATUS SHOWS NO FAULTS FAULT HISTORY SHOWED MAINT MESSAGE 49 11019 DC POWER LOSS SHUTDOWN PWR INTERRUPT ACCOMPLISHED FIM 49 10 801 MAIN BATTERY CHECKED NORMAL APU START AND SHUTDOWN NORMAL APU BITE SHOWS NO FAULTS.