As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5516, IAH TO ATL. THE FLIGHT CREW REPORTED AN ANTI-ICE DUCT FAIL MESSAGE ON EICAS, WITH WING ANTI-ICE DUCT FAIL ILLUMINATED ON THE PUSH BUTTON. THE SYNOPTIC PAGE ON EICAS SHOWS THE LEFT-HAND FUSELAGE DUCT IN RED. THE AIRCRAFT WAS NEVER IN ICING CONDITIONS AND RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE 14TH STAGE SENSING LOOP TO BE BAD. THE LOOP WAS REPLACED AND THE SYSTEM OPERATED NORMALLY.