As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5535 - RECEIVED LEFT BLEED DUCT WARNING IN FLIGHT. EXTINGUISHED AFTER 50 SECONDS. RECEIVED LEFT BLEED MESSAGE, BLEED DUCTS CLOSED RESULTING IN PRESSURIZATION LOSS. DECLARED EMERGENCY AND LANDED WITHOUT INCIDENT. PERFORMED TEST OF BLEED LEAK DETECTION SYSTEM AND INSPECTED DUCTS FOR LEAKS. NO DEFECTS FOUND.