What was found
R GEN DRIVE EICAS MESSAGE. RAN QRH & DISCONNECTED DRIVE SWITCH.(<P>THIS BECOMES DMI 141960, CAT B, MEL 24-00-01-01. DUE 08FEB21. PLACARD INSTALLED. MCC NOTIFIED. ETOPS 180 RESTRICTED. </P><P>LOG 1017409 ITEM #8: REMOVED AND REPLACED R GCU IAW AMM 24-22-02, OPS CHECK OF IDG REQ, REF LP 1017409 ITEM #9 FOR CORRECTIVE ACTION. </P><P>ITEM #9: ENG RUN COMPLIED WITH #2 ENG GCU- GCU OPERATES NORMAL AT THIS TIME IAW 767 M/M 24-11-00. THIS CLEARS DMI 141960.</P>)