What was found
ON CLIMB-OUT FROM ENV, AIRCRAFT WOULD NOT HOLD PRESSURIZATION IN AUTO OR MANUAL. AIRCRAFT RETURNED TO ENV WITHOUT FURTHER INCIDENT. MAINTENANCE DISCOVERED A CLAMP HAD COME LOOSE ON THE WATER SEPARATOR CANNISTOR. MAINTENANCE RESECURED THE CLAMP AND PERFORMED AN OPERATIONAL AND LEAK CHECK. AIR CONDITIONING SYSTEM OPERATIONAL CHECK NORMAL, NO DEFECTS NOTED. AIRCRAFT RETURNED TO SERVICE. (M)