As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO PRESSURIZE AIRCRAFT AFTER TAKEOFF. ACCOMPLISHED ABNORMAL PROCEDURES AND RETURNED FOR LANDING. FOUND FWD ENTRY DOOR NOT FULLY SEATED. INSPECTED DOOR AND SWITCHES. OPERATED DOOR SEVERAL TIMES. DOOR OPERATED NORMAL PER MM 52-11-01.