What was found
DURING TAXI, AFTER STARTING NR1 ENGINE, DC BUSS CAUTION LIGHT ILLUMINATED. AFTER SELECTING NR 1 DC GENERATOR OFF, POPPING SOUND UNDER LT GLARESHIELD, FOLLOWED BY MINIMAL SMOKE. MX INSPECTED AND FOUND AUTOPILOT CIRCUIT CARD FOR ANNUNCIATOR PANEL BURNED AND CIRCUIT BREAKERS G-1 LT ESSENTIAL AND E-3 LT MAIN TRIPPED. DISCONNECTED CONNECTOR ON AUTOPILOT ANNUNCIATOR PANEL. R & R AUTOPILOT DISENGAGE CIRCUIT CARD IAW MM 20-45-04. OPS CHECKED GOOD IAW MM 22-10-04.