As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT GEN FAILED DURING INITIAL CLIMB-OUT WITH AN OPEN BUS TIE THE APU GEN WAS RUNNING AT THE TIME AND CARRIED THE LEFT GEN LOAD FWD LT GEN TO MCO AND PLAC PER MEL24-00-01A LT CSD DISC VERIFIED APU OIL FULL AND PERFORMED A CROSSTIE CK. CKD GCU. NO FAULTS. CHKD CSD CHIP DETECTOR. NO METAL FOUND. REPLACED LT GEN CSD PER M/M. ALSO REPLACED LT ENG GCU. RAN ENGINE CKD GEN/CSD OUTPUT OPERATION PER M/M. ALL CKS GOOD MCO PLAC REMOVED. GCU OFF S/N UM 3656C ON XJ2125B DPN.