As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELEC BACKUP GEN LT BACKUP GENERATOR OFF DUE TO A PROTECTIVE TRIP. STATUS MSG01- NOT ACTIVE CRUISE MODE DEPENDENT; BACKUP GENERATOR (L) TEMPERATURE IS HIGH. DB- BACKUP CONVERTER MSG02- ACTIVE CRUISE MODE DEPENDENT; BACKUP GENERATOR (L) TEMPERATURE IS HIGH. MSG-2446120 INACTV ER MODE MSG-2446120 ACTIVE ER MODE. REPLACED LT BACK UP GEN WITH JAL BORROW PART. BUG OPS CK OK WITH ENG RUN.