As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WENT TO EMERGENCY PRESSURIZATION DURING CLIMB-OUT, WOULD NOT PRESSURIZE AT 8000 FT. PERFORMED UNSCHEDULED LANDING. MX REPLACED RT 3-WAY VALVE, BOTH MOD VALVES AND MOD CONTROL BOX. CABIN PRESSURIZING ON GROUND, APPROX 2000 FPM WHEN ADVANCED THROTTLES. WOULD RETURN TO NORMAL WHEN RETRACTED. CREW TURNED OFF BLEED SWITCHES WITH NO EFFECT. MAINTENANCE REPLACED RT 3 WAY VALVE, RT MODULATING VALVE AND RT VALVE CONTROL BOX. OPS CHECKS NORMAL.