As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EICAS MSG R GEN DRIVE DISPLAYED. GEN DRIVE LIGHT ILLUM. GEN DRIVE DISCONNECTED. ACP'D BPCU BITE AND CHECKED SCAVENGE FILTER (CLEAN FILTER AND DPI NOT POPPED). RESET AND RAN, NO HELP. REPLACED R ENG IDG AND ALL OPS GOOD. ENG RAN AND NO LEAKS APPARENT.