As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLL FLT 811 EN ROUTE PHL TO CUN. DURING CRUISE, RECEIVED A LT UTILITY BUS OFF MESSAGE. ATTEMPTS TO RESET WERE UNSUCCESSFUL. THE CREW DECIDED TO STOP IN FLL TO HAVE MAINTENANCE REPAIR THE ACFT. THE FLIGHT DIVERTED TO FLL WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE LFT DC BUSS, SECTION 1 CIRCUIT BREAKER. OPERATIONALLY CHECKED OK. (S)