As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELEC GEN DRIVE L LEFT IDG FAULT (LOW INTERNAL OIL PRESSURE). REPLACED LT GCU AND SERVICED LT IDG, RAN ENGINE. GEN OPS CHECK OKAY. FOUND GEN DRIVE LIGHT INOPERATIVE. L IDG REPLACEMENT DEFERRED. HAVE ALL PARTS IN HAND, REMOVING IDG AT THIS TIME. REPLACED IDG. OPERATIONS CHECKS NORMAL.