As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT THE AUTO PRESSURIZATION SYS WAS INOPERATIVE DURING FLIGHT. THE CREW RETURNED TO FIELD & LANDED WITHOUT INCIDENT. MX FOUND THE MANUAL PRESSURIZATION SYS TO BE WORKING & DEFERRED THE AUTO PRESSURIZATION. THE DEFERRAL WAS CLEARED ON 6/11/14 WHEN MX REPLACED THE GND AIR CONNECTION FLAPPER VLV.