As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, AN ECAM MESSAGE "VENT SKIN VALVE FAULT", ACFT RETURNED TO DEPARTURE. AFTER AN UNEVENTFUL LANDING AT DEPARTURE, MX PERFORMED FAULT ANALYSIS IAW TSM 21-26-00-810-804-A AND DETERMINED THAT THE CAUSE OF SUCH FAILURE IS THE SKIN AIR OULTLET VALVE. THE VALVE WAS R & R IAW AMM 21-26-53 PB401 AND PERFORMED THE OPS TEST OF THE AVIONICS VENTILATION SYS WITH NORMAL RESULTS. AFTER THOSE MX ACTIONS THE ACFT WAS RETURNED TO SERVICE.