As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START, THE NR 1 GENERATOR WOULD NOT COME ONLINE WITH DRIVE LIGHT ILLUMINATED. ACFT GROUNDED. REMOVED AND REPLACED THE NR 1 IDG IAW AMM 24-11-11. FOUND CONTAMINATION IN FILTERS. REMOVED AND REPLACED IDG AIR/OIL COOLER IAW AMM 24-11-21. REMOVED AND REPLACED IDG OIL COOLER IAW AMM 73-11-06. ALL OPS AND LEAK CHECKED GOOD.