As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW NOTICED CB 10 (CTR BUS POWER) OUT ON P6 ELECTRICAL PANEL. CREW COULD NOT ENGAGE CTR AUTO PILOT REF TO WDM24-51-31 SHEET 1, PAGE 1. UNABLE TO DUPLICATE FAULT CENTER BUS POWER CB STAYS IN WITH CENTER AUTOPILOT ENGAGED CHECKED TB16 AND RELAY K107 FOR PROPER OPERATION WITH NO FAULTS FOUND.