What was found
FLT 1227 - CLT-IAD - AFTER TAKEOFF FROM CLT, THE AIRCRAFT WOULD NOT PRESSURIZE. FLIGHT RETURNED TO CLT. MAINTENANCE REPLACED THE PRIMARY OUTFLOW VALVE. (M)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLT 1227 - CLT-IAD - AFTER TAKEOFF FROM CLT, THE AIRCRAFT WOULD NOT PRESSURIZE. FLIGHT RETURNED TO CLT. MAINTENANCE REPLACED THE PRIMARY OUTFLOW VALVE. (M)