As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SEVEN MINUTES FROM AIRPORT, CREW NOTICED SMOKE COMING FROM ELECTRICAL BAY. WITH NO SYSTEMS FAILED, THE CREW RETURNED TO DEPARTURE WITH NO INCIDENTS. MX FOUND NR 1 PROP PHASE SYNC MODULE HAD BURNED OUT. ALL ACFT WIRES WERE CHECKED OUT TO BE OK, THE SYS WAS DEACTIVATED IAW THE MEL AND RETURED TO SERVICE UNTIL PARTS ARE INSTALLED.