As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, NR 3 FUEL QTY WAS DROPPING AT 2,500 LBS PER HOUR WITHOUT BURNING FROM THAT TANK. VISUALLY CHECKED NR 3 AT CRUISE ALTITUDE AND COULD SEE A STREAM OF FUEL VAPORS OFF THE RIGHT WING. LANDED DFW. FOUND CRACKED FUEL TUBE. REPLACED TUBE AND RETURNED TO SERVICE.