As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R GEN DRIVE EICAS MSG IN-FLIGHT. R GEN DRIVE DISCONNECTED AS PER QRH.(<P>REMOVED AND REPLACED R ENG GCU PER AMM 24-22-02. OPS CHECK GOOD. PERF R ENG IDLE RUN. NO MSG IN VIEW OR DEFECTS NOTED. INSPECTED & VERIFIED I.D.G AT PROPER LEVEL PER AMM 12-13-03. SYSTEM OK.</P>)