As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT - FLT 489 - AFTER TAKEOFF, CREW WAS UNABLE TO PRESSURIZE AIRCRAFT DUE TO MAIN ENTRY DOOR SEAL BEING PARTIALLY ROLLED UNDER. FLIGHT RETURNED TO FIELD AT CLT AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED MAIN ENTRY DOOR SEAL AND FOUND THE SEAL PARTIALLY ROLLED UNDER. OPERATED DOOR FOR PROPER SEAL, DOOR CHECKED NORMAL. (M)