What was found
CABIN ALTITUDE WARNING HORN ACTIVATED AS ACFT BEGAN A SLOW UNCONTROLLABLE CLIMB IN CABIN PRESSURE. OUTFLOW VALVE REPORTED TO BE CLOSED ENTIRE TIME. CREW DESCENDED FLIGHT TO 14,000 FT WHERE PRESSURE STABILIZED. O-2 MASKS DEPLOYED AS A PRECAUTION. FLT LANDED AT CLT WITHOUT FURTHER INCIDENT. NO EMERGENCY DECLARED. MX FOUND FWD CARGO DOOR SEAL OUT OF RETAINER TRACK. RESECURED SEAL & REPAIRED SEVERAL LEAKS ALONG SERVICE DOORS & ENTRY DOORS. R & R AFT OUTFLOW VALVE DUE TO LEAKAGE PER MM. REPLACED ALL DEPLETED OXYGEN GENERATORS AND REPACKED MASKS. ACCOMPLISHED PRESSURIZATION CHECK JOB CARD J321-30-00. ALL INDICATIONS ARE WITHIN LIMITS. AIRCRAFT OK FOR SERVICE.