What was found
AIRCRAFT WAS EN ROUTE FROM MDW TO FTW, AT FL380 CABIN LOST PRESSURIZATION AFTER A NOISE WAS HEARD FROM MAIN CABIN DOOR. THE CABIN DOOR ANNUNCIATED AND CABIN CLIMBED TO 18,000 FEET, O2 MASK DEPLOYED. CREW DECLARED EMERGENCY AND BEGAN EMERGENCY DESCENT. AT 8,000 THE AIRCRAFT WAS LEVELED OFF AND THE CABIN ALTITUDE STABILIZED, THE AIRCRAFT THEN DIVERTED TO ICT FOR MAINTENANCE. FAULT WAS ISOLATED TO FAILED GROMMETT AND A SECONDARY SEAL NEEDING ADJUSTMENT. PRIMARY DOOR SEAL WAS FOUND TO HAVE WATER IN THE SYSTEM DUE TO FAILED GROMMETT. AIRCRAFT REPAIRED AND RETURNED TO SERVICE WITH NO FURTHER PROBLEMS.