As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELEC BACKUP GEN L LEFT BACKUP GENERATOR OFF DUE TO A PROTECTIVE TRIP. STATUS MSG03, ACTIVE CRUISE MODE DEPENDENT; BACKUP GENERATOR (L) SPEED IS OUT OF RANGE. SUSPECT FAULTY BEARING. REPLACED BACK UP GEN. AND DRIVE OIL SEAL. PER AMM 24-25-01 OP CHECKED GOOD. AC OK FOR SERVICE.