As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3818, CREW REPORTED THE ACFT WAS DECLARING AN EMERGENCY FOR ENG 1 ANTI ICE FAIL IN FLIGHT AND FAIL MASTER CAUTION FOLLOWED BY INOP WARNING IN FLIGHT IN ICING CONDITIONS. ACFT REMOVED FROM SERVICE. REMOVED AND REPLACED ENG 1 ANTI ICE VALVE IAW AMM 30-21-01. OPS CHECK GOOD. ACFT RETURNED TO SERVICE.