As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GENERATOR NUMBER 3 ON LINE TAXIING TO THE GATE, NUMBER ONE ENGINE WAS SHUTDOWN, BOTH AC BUSSES DROPPED OFF LINE AND ELECTRICAL SMOKE IN THE COCKPIT. CREW WAS UNABLE TO RESET THE NUMBER 3 GENERATOR. NUMBER 3 GCU REPLACED AND SYSTEM OPS CHECKED GOOD.