As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 0092 - AFTER TAKEOFF DFW/EWR, CREW WAS UNABLE TO CONTROL PRESSURIZATION. AIRCRAFT RETURNED TO DFW, DUMPED FUEL, AND LANDED WITHOUT INCIDENT. REPLACED NR 3 ENGINE 13TH STAGE MODULATING VALVE. ACCOMPLISHED CHECK OF BLEED AND PRESSURIZATION SYSTEM. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)