As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN ALTITUDE CONTROL PROBLEM. OXYGEN MASKS AUTO DEPLOYED. DESCENDED TO 10000 FEET AND THE CABIN PRESSURE KEPT CLIMBING. REPLACED BROKEN DOOR HINGE FOR GROUND AIR CONDITIONING COVER. REPLACED BOTH SAFETY VALVES AND OUT FLOW VALVES. SYSTEM GROUND CHECKED NORMAL OPERATION. (CLOSED)