As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SCHEDULED FLIGHT, THE CREW NOTED SMOKE IN COCKPIT AND OBSERVED LIGHT SMOKE FROM THE NUMBER 2 VOLTAGE REGULATOR. ATM WAS STARTED AND NUMBER 2 GENERATOR CONTROL PANEL WAS REMOVED. NUMBER 2 VOLTAGE REGULATOR STOPPED SMOKING, WITH NO FURTHER DAMAGE NOTED. SYSTEM CURRENTLY DEFERRED. TROUBLESHOOTING IN PROGRESS. WILL UPDATE SDR WITH FINAL DISPOSITION WHEN KNOWN.