As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL LIGHT ILLUMINATED ON ELECTRICAL PANEL. ACFT GROUNDED. PERFORMED LIGHT MESSAGE BITE PROCEDURE IAW FIM 24-31 TASK 801. FOUND SPCU FAILED MESSAGE. WOULD NOT RESET. CYCLED SPCU NORMAL & STBY CIRCUIT BREAKER ON SPCU FRONT PANEL, AND CLEARED ELEC LIGHT SPCU FAULT IAW FIM 24-34 TASK 802.