As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT NR 2 GENERATOR DRIVE LIGHT AND MASTER CAUTION ILLUMINATED. RETURNED TO GATE. ACFT GROUNDED. TROUBLESHOOT FOUND IDG FAULT LIGHT ON GCU NR 2. PERFORMED FIM 24-21 TASK 806, R & R NR 2 ENGINE IDG REF AMM 24-11-11, OPS & LEAK CHECKED GOOD.