As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, CABIN ALTITUDE AUTO 2 STATUS MESSAGE. ZERO DUCT PRESSURE FROM ENGINE OR APU BLEEDS. PERFORMED EMERGENCY DECENT DUE TO LOSS OF CABIN PRESSURE. MAINTENANCE PERSONNEL PERFORMED A CABIN PRESSURE CONTROL SYSTEM TEST PER AMM. NO FAULTS NOTED. PERFORMED ENGINE RUN AND FOUND ENGINE AND APU DUCT PRESSURE TO BE SATISFACTORY.