As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, COULD NOT CONTROL CABIN PRESSURIZATION. AIRCRAFT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. FOUND FORWARD CABIN DOOR GUIDE ARM OUT OF RIG. RIGGED DOOR GUIDE ARM. OPERATIONAL CHECK OK. PRESSURIZED AIRCRAFT TO 4 PSI. OPERATIONAL CHECK OF FORWARD DOOR SEAL WAS OK.