As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE IDG AIR/OIL COOLER LEAKING. ACFT GROUNDED. REMOVED AND REPLACED THE NR 1 IDG AIR/OIL COOLER IAW AMM 24-11-21-000-801, AND 24-11-21-400-801. NR 1 ENG IDG OIL COOLER LEAK CHECK GOOD IAW AMM 71-00-00-700-801-F00. ETOPS GROUND VERIFICATION SUCCESSFUL.