As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DUE TO HISTORY OF RT IDG DRIVE LIGHT ON IN FLIGHT AND POSSIBLE FUEL CONTAMINATION AT TERMINATION OF FLT REPLACE IDG AIR-OIL HEAT EXCHANGER AND VALVE. (HEAT EXCHANGER AND VALVE SHOULD BE REPLACED AS AN ASSY). AIR OIL COOLER REPLACED IAW MM.