What was found
DURING TAKEOFF FROM KMDW, FLIGHT CREW RECEIVED AN ECAM AIR BLEED 2 FAULT. RAN ECAM ACTION FOR FAULT. APPROX 1 HR INTO THE FLIGHT, THEY RECEIVED AN ECAM AIR BLEED 1 FAULT, THEN LOST BOTH PACKS. PERFORMED AN EMERGENCY DESCENT TO 10,000 FT AND DECLARED AN EMERGENCY. AIRCRAFT LANDED AT KDEN WITHOUT INCIDENT. NR 1 AND NR 2 ENGINE FAN AIR VALVES FAILED FUNCTIONAL TEST IAW AMM 36-11-54-720-001. REMOVED AND REPLACED NR 1 AND NR 2 ENGINE FAN AIR VALVES IAW AMM 36-11-54-000-001 AND 36-11-54-400-001. PERFORMED LEAK CHECK OF NR 1 AND NR 2 ENGINE FAN AIR VALVE CONNECTIONS IAW AMM 36-11-54-790-050, STEP B. (3) AND (4). PERFORMED OPERATIONAL TEST OF NR 1 AND NR 2 ENGINE FAN AIR VALVES IAW AMM 36-11-54-790-050 AND 36-1