What was found
RDU - FLT 888 - EN ROUTE PBI/PHL, AT FL 330 OVER FL0, CREW REPORTED THEY LOST PRESSURIZATION. OXYGEN MASKS DEPLOYED. FLIGHT DESCENDED IN ALTITUDE, DIVERTED TO RDU AND LANDED WITH NO FURTHER INCIDENT. MAINTENANCE FOUND THE RUBBER DUCTS AT THE LEFT AIR CYCLE MACHINE DISCONNECTED. REPLACED THE RUBBER DUCTS AND CLAMPS. ALSO, THE SAME DUCT FOR THE RIGHT AIR CYCLE MACHINE WAS REPLACED. (X)