As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT, THE CREW NOTICED A FUEL CONNECT VALVE OPEN WARNING. THE CREW RETURNED TO THE GATE AND MAINTENANCE WAS CALLED OUT. MAINTENANCE INSPECTED AND CYCLED SWITCHES ON THE FUEL PANEL, OPERATION CHECKS WERE GOOD PER DORNIER MAINTENANCE MANUAL 73-00-00.