As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 1044 - EN ROUTE FOR RETURN TO DFW, AFTER NR 3 ENGINE SHUTDOWN LEFT NOZZLE ON FUEL DUMP VALVE DID NOT OPEN DURING FUEL DUMP. AIRCRAFT LANDED DFW WITHOUT INCIDENT. CANNON FOR DUMP VALVE LOOSE AND DIRTY. CLEANED AND SECURED CANNON PLUG. SYSTEM GROUND CHECK NORMAL OPERATION. (M)