As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT - FLT 2668 - EN ROUTE FROM MCO-IAD, AT FL290, THE NR 1 TRANSFER BUS CIRCUIT BREAKER POPPED. CREW RESET CIRCUIT BREAKER BUT IT POPPED AGAIN FIVE MINUTES LATER. FLIGHT DIVERTED TO CLT AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED AND REPLACED THE NR 1 TRANSFER BUS CONTACTOR. OPERATIONAL CHECK GOOD PER MM 24-21-0. (M)