What was found
AIRCRAFT LOST CABIN PRESSURIZATION AT FL350. FLIGHT CREW FOLLOWED COM PROCEDURES AND DESCENDED TO FL90. CABIN OXYGEN MASK DEPLOY SYSTEM ACTIVATED. FLIGHT CONTINUED TO DESTINATION AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED OXYGEN GENERATOR CANISTERS AT 3CD, 3AB, 1AB, AND JUMPSEAT FORWARD CANISTER AND REPLACED THE CABIN PRESSURE CONTROLLER, OPERATIONAL CHECK NORMAL.