As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT THE CREW RECEIVED A RIGHT HAND PACK HIGH PRESSURE CAUTION MESSAGE. THE LEFT PACK WAS ALREADY ON DEFERRAL. THE FLIGHT WAS AT 14000 WHEN THIS OCCURRED. THE CREW DECLARED AN EMERGENCY AND RAPIDLY DECENDED TO 10000. THE AIRCRAFT LANDED SAFELY WITHOUT FURTHER INCIDENT. THE AIRCRAFT WAS GROUND RAN AND OPS CHECK GOOD.