As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A RT PACK OVERPRESSURE AFTER TAKEOFF . THE PRESSURE NEVER WENT BELOW 60 PSI AND WAS AT 94 PSI WHEN FAILED. CREW ELECTED TO RETURN TO DEPARTURE AND LANDED WITHOUT INCIDENT. MX REMOVED AND REPLACED THE RT PRESSURE REGULATING SHUTOFF VALVE (PRSOV) AND PERFORMED OPS CHECKS IAW THE MM. NO FURTHER DEFECTS WERE NOTED. THE ACFT WAS RELEASED FOR SERVICE.