As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED OF AN AMBER CAS MESSAGE INDICATING 31 VOLTS FOR APPROXIMATELY 30 SECONDS ON THE RIGHT DC GENERATOR. THEN VOLTAGE RETURNED TO NORMAL WITHOUT CREW INTERVENTION. THE MAINTENANCE TEAM TROUBLESHOT AND DETERMINED A DEFECTIVE RIGHT GENERATOR CONTROL UNIT. THE DEFECTIVE UNIT WAS REMOVED AND AN OVERHAULED UNIT INSTALLED. OPS CHECKS WERE SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE