What was found
FLT CREW REPORTED CABIN PRESSURIZATION FLUCTUATING FOLLOWED BY NR 2 CONTROLLER FAILURE. ECAM EXCESS CABIN ALT. AT APPROX 30,000 FT & CLIMBING. NOTICED CABIN ALT SHOWING IN EXCESS OF 29,000 FT, CABIN MODE NR 1 CONTROLLER LATER ASSUMED CONTROL & CABIN PRESSURE RETURNED TO BELOW 10,000 FT. CABIN O2 MASKS DID NOT AUTOMATICALLY DROP. MANUALLY DEPLOYED OXYGEN MASKS FROM FLT DECK. DECLARED AN EMERGENCY & PERFORMED AN OVERWEIGHT LANDING PER CHECKLIST. LANDING NORMAL. REPLACED PRESSURE CONTROLLER 11 HL PER LEAK LESS THAN 0.78 PSI/MIN. PERFORMED FUNCTIONAL CHECK OF AUTOMATIC MASK RELEASE PER AMM 35-23-00-720-003. OPS CHECK NORMAL.