As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WING ANTI-ICE WARNING MSG IN FLIGHT. ALL ANTI-ICE OFF. FL270 NORMAL NO TURB. NO OTHER INDICATION. DIVERTED TO DTW DUE ICEING COND AT DEST AIRPORT. ON ANTI-ICE PAGE LEFT WING & FUSELAGE RED LINE. ALL ENG INDICATION NORMAL. FOUND LT 14TH ST AFT FUSELAGE LOOP A47WK SHORTED. REMOVED AND REPLACED LOOP IAW AMM 36-21-04. OP CHECK GOOD.