What was found
AFTER TAKEOFF PROCEDURE TO PEI - VENT SKIN VALVE ECAM APPEARS AND THE CAB ALT STAYS AT 5000FT AND DOES NOT PRESSURIZE. -- IN ACCORDANCE WITH TASK 21-31-00-710- 002-A OPERATIONAL TEST OF THE PRESSURIZATION CONTROL MONITORING WAS ACCOMPLISHED IN BOTH PCP. IT WAS VERIFIED THE MAINTENANCE PROCEDURE ABOUT AVIONIC VENTILATION SYSTEM FAULT IN ACCORDANCE MEL 21-26-10 AND IN ACCORDANCE WITH TASK 05-53-00-780-003-A THE A/C PRESSURIZED IN MANUAL MODE WITH APU BLEED, IAW AMM 21-26-52 PB401 THE SKIN AIR VALVE WAS REPLACED IAW AMM 21-26-00-710- 001, OPERATIONAL TEST WAS PERFORMED, TEST OK.