As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A RT BLEED DUCT WARNING IN FLIGHT, RT BLEED VALVES CLOSED AUTOMATICALLY. SHORTLY AFTER THE LEFT BLEED VALVES CLOSED AND THE CABIN PRESS BEGAN TO DECREASE THE CREW INITIATED AN EMERGENCY DECENT AND DEPLOYED THE MASKS. AC LANDED WITHOUT INCIDENT. MAINTENANCE IS CURRENTLY TROUBLESHOOTING.