What was found
(CAN)CABIN PRESSURE 1 & 2 FAULT IN CRUISE AT FL350, UNABLE TO CONTROL MANUALLY. FLIGHT CREW REPORTED EAR PAIN FOLLOWED BY ECAM WARNING, CABIN ALTITUDE AT 8500 FEET AND CLIMBING, OUTFLOW VALVE INDICATING FU LL OPEN. NO APPRECIABLE POSITION CHANGE WHEN STANDBY SYSTEM TOGGLED TO CLOSED. EMERGENCY DESCENT INITIATED. STANDBY CONTROL OF THE OUTFLOW VALVE WAS LATER CONFIRMED AND THE CABIN PRESSURE WAS MANUALLY CONTROLLED DURING DESCENT. OUTFLOW VALVE WAS REPLACED AND TESTED SERVICEABLE.