As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WILL NOT PRESSURIZE IN NORMAL OR AUTOMATIC. NO AUTHORITY WITH MANUAL WITH FULL INCREASE PRESSURE. CABIN VERTICAL SPEED INDICATOR FULL CLIMB THROUGHOUT. *S/D* REPLACED LEFT OUTFLOW VALVE PER MAINTENANCE MANUAL 21-30-51, PERFORMED SYSTEM ADJUSTMENT TEST AS PER 21-30-0. SYSTEM OPERATIONAL CHECKS GOOD ON GROUND IN MANUAL AND AUTO MODE.