As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE, OUT OF ANC, LEVEL 2 'GEN BUS 3 ALERT'. DEPLOYED ADG AND RETURNED TO FIELD. MAINTENANCE PERFORMED TROUBLESHOOTING IAW FIM 24-20-17. AIRCRAFT RELEASE TO SERVICE ON MEL 24-21-1. MEL 24-21-1 CLEARED ON 12-09-12 WITH REPLACEMENT OF IDG.