As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRESSURIZATION AUTO FAIL LIGHT CAME ON, WAS UNABLE TO CONTROL PRESSURIZATION IN STANDBY OR MANUAL MODE. CABIN WAS CLIMBING AT AN UNCONTROLLABLE RATE. REPLACED MAIN OUTFLOW VALVE AND PRESSURIZATION SELECTOR PANEL. FOUND PIN PUSHED IN ON PANEL, TESTED PRESSURIZATION SYSTEM AND CHECKED OK.