As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON DESCENT THE PRESSURIZATION FAILED IN AUTO, FAULT LIGHT ON PRESSURIZATION PANEL. SWITCHED TO MANUAL, STILL NO CONTROL OVER THE OUT FLOW VALVE. USED FORWARD SAFETY VALVE FOR THE REST OF THE DESCENT. OUTFLOW VALVE OPENED ON LANDING.FOUND THE PRESSURIZATION CONTROL PANEL AT FAULT. PRESSURIZATION CONTROL PANEL REPLACED AND FUNCTION CHECKED SERVICEABLE.