As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 GENERATOR AT FL 360, DRIVE LIGHT DID NOT ILLUMINATE. TRIED TO RESET THE GENERATOR IAW QRH BUT DID NOT COME BACK ONLINE. APU STARTED AND POWERED LEFT TRANSFER BUSS FOR REMAINDER OF FLIGHT. ACFT GROUNDED. REMOVED AND REPLACED THE NR 1 IDG IAW AMM 24-11-11. NO DEFECTS NOTED IAW AMM 24-11-11-080-801. OPS CHECKED GOOD IAW AMM 24-11-00-700-802.