As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT THEY RECEIVED A GENERATOR 1 AND GENERATOR 3 OFF BUSS MESSAGED DURING FLIGHT. THE CREW RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE NUMBER 1 AND NUMBER 3 GENERATOR CONTROL UNITS. OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.