As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT BLEED DUCT WARNING MESSAGE IN FLIGHT. LOST CABIN PRESSURE. DECLARED AN EMERGENCY. ACFT RETURNED TO DEPARTURE. R & R ANTI-ICE CONTROLLER IAW 30-12-12 PERFORMED SUCCESSUL OPS CHECK. PERFORMED OPS CHECK OF THE LT PACK IAW AMM 21-51-00, REF 30-12-12 ITEM NR 5. NO FURTHER DEFECTS NOTED. ACFT OK FOR SERVICE.