As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED CABIN NOT PRESSURIZING DURING CLIMBOUT. LEVELED AT 10,000 FT AND CABIN WAS AT 8,000 FT. CREW RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND OVERBOARD EXHAUST SHUTOFF VALVE, SOV, IN OPEN POSITION. MAINTENANCE SELECTED OVERBOARD EXHAUST SOV TO CLOSED POSITION IAW AMM. ACFT RELEASED FOR SERVICE.