As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, THE NR 1 CONSTANT SPEED DRIVE TEMPERATURE ROSE ABOVE AN ACCEPTABLE LEVELS AND WAS DISCONNECTED BY FLIGHT CREW. EMERGENCY DECLARED. LANDING UNEVENTFUL. AIRCRAFT GROUNDED. REMOVED AND REPLACED THE NR 1 CONSTANT SPEED DRIVE TRANSMISSION AND GENERATOR IAW AMM 24-10-01. OPS AND LEAK CHECKED NORMAL.