What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED. AIRCRAFT RETURN TO DFW SAFELY. PRESSURIZATION FAILURE DURING CLIMB. REPLACED AFT OUTFLOW VALVE ASSEMBLY PER AMM 21-31-03.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED. AIRCRAFT RETURN TO DFW SAFELY. PRESSURIZATION FAILURE DURING CLIMB. REPLACED AFT OUTFLOW VALVE ASSEMBLY PER AMM 21-31-03.