As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT WOULD NOT PRESSURIZE AFTER TAKEOFF. RETURNED TO FIELD. LANDING UNEVENTFUL. FERRIED FOR REPAIRS. R & R AFT OUTFLOW VALVE AS A PRECAUTIONARY MEASURE. FUNCTIONAL CHECK COMPLETE, OPS CHECK GOOD. RESERVOIR DRAIN LINES FOR CABIN DOOR SEAL PRESSURIZATION SYS. RETURNED TO SERVICE.