As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKE OFF ROLL VENT AVIONICS SYSTEM FAULT APPEARS ON ECAM. AIRCRAFT DIDNT PRESSURIZE DURING FLIGHT. MASK WERE USED AND INMEDIATE RETURN WAS REQUIRED. IN ACCORDANCE WITH TSM 21-26-00-810-804A / AMM 21-26-53-000-002/400-001-A01 THE SKIN AIR OUTLET VALVE 22HQ WAS REPLACED. TEST SATISFACTORY. ) IN ACCODANCE WITH AMM 35-12-41-100-802-A CLEANING OF FULL-FACE OXYGEN MASK WAS PERFORMED AND PRESSURE OF OXYGEN BOTTLE IS WITHIN LIMITS