As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CHECK VALVES ON LEFT SIDE, RIGHT SIDE OF CABIN INSTALLED WITH HINGE NOT AT 12 OCLOCK POSITION. RIGHT VALVE AT 5 OCLOCK, LEFT VALVE AT 2 OCLOCK. FACTORY ORIGINAL TORQUE SEAL WITH INSPECTORS STAMP ON IT HAD NEVER BEEN BROKEN. VALVES REMOVED AND INSPECTED AND REINSTALLED IN CORRECT POSITION.