As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SYSTEM 1 FAULT DISPLAYED ON UPPER ECAM SCREEN. - CAB PR. CAB PR 1 SAMC TEXT: CFDS FAULTS OUTFLOW VALVE: 644-4602, REPLACE PER AMM. REMOVED AND REPLACED PRESSURIZATION OUTFLOW VALVE IAW AMM 21-31-51. CHECKS OK, NO FAULTS. ATA CHANGED TO SHOW HISTORY IN CHAPTER 21.