As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON ESTABLISHING AIRCRAFT ON APU AIR THE AUTOFAIL LIGHT AND ALTN LIGHTS ILLUMINATED. ACFT GROUNDED. VERIFIED FAULT. CYCLED PANEL CONTROL SWITCH FROM AUTO TO MAN & BACK TO AUTO, ALL LIGHTS OFF. ACCOMPLISHED A DCPC BITE. FOUND FAULT 001 (COMMUNICATION FAULT) ON NR 2 CONTROLLER. GROUND TEST PASSED, NO FAULTS. DCPC BITE ON CONT NR 1, NO FAULTS. GROUND TEST PASSED, NO FAULTS. IAW FIM 21-31 TASK 801 GROUND VERIFICATION PASSED, THIS FAULT WAS INTERMITTENT IAW FIM 21-31 TASK 807.