As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 1911 - IAH - THE AIRCRAFT WAS RETURNED TO IAH AFTER TAKEOFF DUE TO UNEVEN FUEL BURN FROM FUEL TANKS. THE NR 1 TANK WAS BURNING FASTER THAN OTHERS. FUEL WAS DUMPED TO CONTROL BALANCE. MAINTENANCE FOUND THAT THE NR 1 FUEL TRANSFER VALVE WAS NOT WORKING DUE TO A POPPED CIRCUIT BREAKER. THE CIRCUIT BREAKER WAS RESET. THE ENGINES WERE RUN FOR SEVERAL MINUTES AND FUEL BURN WAS NORMAL. (Z)