As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DURING CLIMB OUT, VENT SKIN VALVE FAULT MESSAGE APPEARED ON UPPER ECAM. FOLLOWED ECAM PROCEDURE, FAULT DID NOT CLEAR. FLIGHT RETURNED TO DFW LANDING SAFELY. REPLACED SKIN AIR OUTLET VALVE PER AMM 21-26-53. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.