As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RTFL DUE TO A RT ENGINE GENERATOR PROBLEM. AFTER TROUBLESHOOTING,FOUND RT GCU CIRCUIT BREAKER OPEN & GEN CONTROL UNIT BURNED INSIDE. REPLACED GCU AND OPS CHECKED GOOD. OPENED UP GCU MR24241-13 AND VERIFIED A UNIT INTERNAL FAILURE WITH BURNED CIRCUIT BOARD. CONDUCTED VERIFICATION FLT & FLT CREW FOUND RT ELECTRICAL SYSTEM GOOD.