What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO TUL DUE TO THE FLIGHT CREW REPORTING THAT THEY LOST PRESSURIZATION AT FL340. THE FLIGHT CREW DESCENDED TO 10, 000 FEET AND REPORTED THAT THE CABIN PRESSURIZATION WAS ERRATIC FOR THE REMAINDER OF FLIGHT. THE AIRCERAFT LANDED SAFELY AT TUL MAINTENANCE FOUND A BELLOWS ON THE RIGHT-HAND PACK JUST UP STREAM OF THE CONDENSOR BLOWN APART AND REPLACED IT. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLSIHED WITH NO ISSUES NOTED.