As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER STARTING ENGINE NR 2 AND ENGINE NR 3 HAD SMOKE IN COCKPIT. CREW EVACUATED AIRCRAFT. FOUND NR 2 AC CONTROL PANEL BURNT OUT. REMOVED AND REPLACED NR 2 AC CONTROL PANEL IAW MM 24-5-7, ALSO REMOVED AND REPLACED GENERATOR RELAY IAW MM 24-5-3. OPERATIONS CHECK NORMAL IAW MM 24-00.