As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN ALTITUDE WARNING MESSAGE ON CLIMBOUT. THE CREW DELCARED AN EMERGENCY, RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE PERFORMED PRESSURIZATION TEST AND CHECKS IAW THE AMM. OPS CHECKED GOOD. THE AIRCRAFT WAS RELEASED FOR SERVICE.