As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT (GEN 1) "SOURCE OFF" LIGHT ILLUMINATED ON DESCENT AT 20 000 FT. REF FIM TASK 24 21 00 GCU BITE TST SHOWS NR 1 IDG FAULT. NR 1 GCU LRU BITE TEST OK. NR 1 IDG REQUIRES REPLACEMENT REF. FIM TASK 24 21 TSK 806. REPLACED NR 1 IDG PER MM 24 11 11. COMPLETED OPERATION TEST PER 24 11 00 OPS NORMAL.