As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELEC GEN SYSTEM LEFT IDG HAS DISCONNECTED OR A PROTECTIVE TRIP OF THE GENERATOR CONTROL BREAKER HAS OCCURRED OR A PROTECTIVE TRIP OF THE BTB HAS OCCURRED. STATUS MSG01- LATCHED CLIMB MODE DEPENDENT; GENERATOR CONTROL UNIT (L) HAS AN INTERNAL FAULT. DB-GENERATOR CONTROL UNIT (L) MSG-2430031 LATCHD CL MODE REPLACED LEFT GCU PER MM. RAN ENGINE, OPS CHECKED NORMAL.