As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2077 - EWR - FLIGHT CREW PERFORMED AIR RETURN DUE TO "WING A/I FAIL" MESSAGE ON EICAS IN ICING CONDITION AND NO "OPEN" LIGHT ON WING A/I BUTTON. CREW LANDED UNEVENTFULLY. EWR MX REMOVED AND REPLACED NR 2 WING A/I VALVE AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.