What was found
THE PILOT REPORTED THAT THE ECAM WARNING ILLUMINATED FOR THE SKIN VENT VALVE, ON DEPARTURE AT 1500 FT. MAX FL 10,000 FT, MAN V/S CTRL . FULL UP UNPRESSURIZED CABIN. MAINTENANCE REMOVED AND REPLACED THE OUTFLOW VALVE IAW AMM 21-26-53. OPS TESTED GOOD.