As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CUSTOMER CALLED WITH ELECTRICAL SYSTEM FAIL/ELECTRICAL SYSTEM FAULT. CAIMS REPORTING SPDA1 RX EMSCDU2 FAULT. FOUND WIRING TO SPDA NR 1 HEAT DAMAGED. FOUND TRU 2 FEED WIRE TO THE DCPC IS THE ROUTE CAUSE OF DAMAGE. CABLE PB189A4 HAD COME LOOSE FROM THE FEED CIRCUIT BREAKERS AND FELL ON SPDA NR 1 CAUSING THE ARCING HEAT DAMAGE.