As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, THE CREW REPORTED A LT GENERATOR FAIL MESSAGE. CREW CONSULTED WITH DISPATCH AND MADE AN AIR-TURN-BACK. MECHANIC SWAPPED LT AND RT GENERATORS AND ALL OPERATIONAL CHECKS WERE GOOD. DURING TAXI OUT FOR THE NEXT FLIGHT THE LT GENERATOR FAILED. MECHANIC SWAPPED THE LT AND RT HALLEFECT DEVICES AND REPLACED THE 1VE PANEL. PROBLEM HAS NOT RETURNED.