As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING NORMAL STARTUP AFTER N1 REACHED 67% AND THE GENERATOR SWITCH WAS TURNED ON. THERE WAS A BURNING SMELL OF BURNED RUBBER, AND THEN SMOKE STARTED COMING OUT FROM THE COCKPIT AREA. I IMMEDIATELY HAD THE CREW EVACUATE AND SHUTDOWN THE ENGINE.