What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO LAS DUE TO THE FLIGHT CREW REPORTING A VENT SKIN VALVE FAULT AFTER TAKEOFF. THE FLIGHT CREW ACCOMPLISHED THE ECAM PROCEDURE WHICH LIMITED THE AIRCRAFT TO 10000 FEET ALTITUDE. THE AIRCRAFT LANDED SAFELY AT LAS WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND AVIONICS COOLING DUCT BLOWN IN THE E&E BAY AND REPLACED IT PER AMM 21-26-41 (AALA202602284210) MAINTENANCE ALSO REPLACED THE SKIN AIR OUTLET VALVE PER AMM 21-26-53. (AALA202603027466) A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.