As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 GEN DRIVE LIGHT CAME ON DURING TAXI. GOOD DISCONNECT OBSERVED 0 VOLTS & 0 FREQS. PERFORMED OPERATIONAL LOAD TEST OF NR 2 IDG LOAD TEST GOOD REF MM 24 11 00 700 803. REMOVED & REPLACED NR 2 GCU AS A PRECAUTION. TESTS GOOD (INST & LOAD) REF AMM 24 21 81. VERIFICATION FLIGHT SUCCESSFUL.