What was found
L GEN DRIVE EICAS MSG IN CRUISE. COMPLETED QRH PROCEDURE(<P>PLACED THE LEFT IDG ON DEFERRAL IAW MEL 24-00-01-02 CAT B. MDDR 106655. DUE 02FEB2019. MAINT PROCEDURES C/W. AIRCRAFT RELEASED ETOPS 120 RESTRICTED. DISP DP @ 15:55Z.</P><P>REF LOG PAGE 1053043; REMOVED AND REPLACED LEFT IDG IAW B767 AMM 24-11-01. PERFORMED OPS TEST IAW B767 AMM 24-11-00 WITH NO ISSUES NOTED AT THIS TIME. PERFORMED LEFT ENGINE RUN WITH NO DEFECTS NOTED AT THIS TIME IAW B767 AMM 71-00-00. THIS CLEARS MDDR 106655</P>)