As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT FROM DFW RECEIVED BLEED AIR DUCT WARNING MSG. A/C DEPRESSURIZED, EMERGENCY DECLARED. A/C RETURNED TO DFW LANDED SAFELY. INTEROGATED MDC FOUND LOOP MT 227 FLAGGED. INSPECTED LOOP MT 227 AND SURROUNDING LOOPS, NO DEFECTS NOTED. PERFORMED ANTI-ICE LEAK TEST AND BLEED AIR SYSTEM LEAK TEST. NO DEFECTS NOTED.