As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO PRESSURIZE BEYOND .8 PSI DIFFERENTIAL AT 10,000 FT WITH APU BLEED OFF AND RIGHT PACK TO HIGH. *S/D* RIGHT HAND FLOW CONTROL AND MODULATION VALVE FAILED TO THE CLOSED POSITION. REPLACED THE RIGHT HAND FLOW CONTROL AND MODULATION VALVE.