What was found
HAD LEVEL 2 GENERATOR DRIVE 3 FAULT, ONE HOUR, 42 MINUTES INTO FLIGHT. ACCOMPLISHED DISCONNECT IAW AOM & QRH. R & R THE IDG FILTER ELEMENT. RESET INDICATION ZIDG & EPUC. RESERVICED TO LIMIT. RAN ENGINE AND FOUND NO FAULTS FIM 24-20-00-101, AND AMM 24-11-3-24-21-3