As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING TAXI TO POSITION FOR DEPARTURE, THE CREW NOTED ILLUNINATION OF THE RT AC GENERATOR FAULT LIGHT. TROUBLESHOOTING OF THE SYSTEM DETERMINED THAT THE RT GENERATOR CONTROL UNIT WAS AT FAULT. THE ASSEMBLY WAS REPLACED, THE SYSTEM TESTED SERVICEABLE, AND THE AIRCRAFT RELEASED.