As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB-OUT, AIRCRAFT WOULD NOT PRESSURIZE IN EITHER MANUAL OR AUTO MODE. MAINTENANCE CONTROL HAD THE AIRCRAFT RETURN TO THE FIELD. MAINTENANCE INSPECTED AND RESEATED THE NOSE MAINTENANCE DOOR IN ACCORDANCE WITH 52-42-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.