As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK, ON CLIMB-OUT RECEIVED ECAM MESSAGE 'VENT SKIN VALVE FAULT'. CREW COULD NOT MAINTAIN CABIN PRESSURE. AIRCRAFT RETURNED TO LAS AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND 'AVNC VENT' CNT CIRCUIT BREAKER OUT. RESET CIRCUIT BREAKER D7. SYSTEM TEST WAS OK. REPLACED AEVC AS PRECAUTIONARY PER AMM 21-26-34. OPS CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE. (W)