What was found
DURING CLIMB-OUT OF LAS EN ROUTE FOR PHL AT 7000 FT, RECEIVED ECAM WARNING AVIONICS VENT SKIN AIR VALVE FAULT, FOLLOWED ECAM INSTRUCTIONS THAT RESULTED WITH AN ECAM VENT BLOWER FAULT AND VENT EXTRACT FAULT, AS A RESULT LOST WEATHER RADAR, TURNED BACK TO LAS AND LANDED WITHOUT FURTHER EVENT. MX REMOVED AVIONICS EQUIPMENT VENTILATION COMPUTER IAW AMM 21-26-34-4, AND AVIONICS VENT FILTER AND HOUSING IAW AMM 21-26-42-920-001, OPERATIONAL CHECKS WERE GOOD. SUPP - VENDOR INCOMING FUNCTIONAL TEST OF AVIONICS EQUIPMENT VENTILATION COMPUTER S/N VL2062001616 COULD NOT DUPLICATE REASON FOR REMOVAL. ACCOMPLISHED SERVICE BULLETINS 87292325-21-008 AND 87292325-21-011, TESTED UNIT.