As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELEC BACKUP SYS EICAS ADVISORY BACKUP ELECTRICAL SYSTEM FAILURE. FOUND MAINT MSG 24-45000 NO PFCS INTERFACE STATUS MESSAGE PLACED ON MEL 2425A. DISPLAYED. FIM TASK 24-25 TASK 802 PERFORMED AND ENG GROUND RUN PERFORMED BY FLIGHT CREW MSG CLEARED