As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L GEN OFF EICAS DURING TAXI AC RETURENED TO GATE AND GROUNDED BY MAINTENANCE ,DEFERRED LH IDG IAW ABX-24-00-1-1. AND AC REURNED TO SERVICE AND DEPARTED. AC FLEW TO CVG AND LH IDG WAS REPLACEDIAW B767 AMM 24-11-01. PERFORMED OPS CHECK IAW B767 AMM 24-11-00. OPS CHECK LEAK CHECK GOOD. THIS CLEARS DI# 49271 LEFT GEN INOP PLACARD REMOVED. A/C REMAINS ETOPS 120.