As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JUST AFTER TOP OF DESCENT GOT A R GEN DRIVE EICAS MESSAGE 30 SECONDS LATER ALL LIGHTS WENT OUT ON THEIR OWN WITHOUT DISCONNECT, LIGHTS CAME ON AT 10K FEET. QRH C/W AND DISCONNECTED RIGHT GENERATOR DRIVE. MAINTENANCE FOUND IDG/PRESSURE SWITCH WIRING AND SERVICE IDG MESSAGES. CLEANED CONNECTORS AND SERVICED IDG. SYSTEM OPERATION IS NORMAL.