As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: INBOUND TO DFW ON ARRIVAL FMS DEVIATED FROM VERTICAL PROFILE. STD QNH STARTED FLASHING AT FLASHING AT FL 270. FMS TOTALLY OFF PROFILE. ECAM CABIN PRESSURE SAFETY VALVE OPEN WITH LOW DIFF PR ABOUT FL 17,000 FT. CABIN PRESSURE LOST AT 8,000 FT. LANDED UN-PRESSURIZED. **ORIGIANL REPORT WAS AALA202204075432** REPLACED BOTH SAFETY VALVES 6HL AND 7HL (AALA202204086106) PER AMM 21-31-52. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.