As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - FLT 1314 - CABIN ALTITUDE WARNING LIGHT CAME ON ABOVE 10,000 FEET. CREW COULD NOT GET AIRCRAFT TO PRESSURIZE IN EITHER AUTOMATIC OR MANUAL MODE. CREW RETURNED TO STATION. PASSENGER DOOR SEAL WAS DAMAGED. INITIALLY DEFERRED PRESSURIZATION, THEN LATER REPLACED CABIN DOOR SEAL. (M)