As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEN DISCON SYS 2 CAUTION APPEARED IN FLIGHT. TROUBLESHOT IAW THE CHECKLIST, BUT CAUTION REMAINED. GEN AMPS ON #2 WAS READING 0 AFTER NOTICING CAUTION AND REMAINED AT 0 THROUGHOUT TROUBLESHOOT AND SHUTDOWN. AFTER SWAPPING GCU'S, THE PROBLEM FOLLOWED TO THE #1 SIDE. REMOVED AND REPLACED GENERATOR CONTROL UNIT IAW AMM 24-30-00, 4-1. MOC SUCCESSFULLY COMPLETED, NO FAULTS/LEAKS NOTED.