As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE, AIRFOIL ICE PROTECTION PRESSURE ABNORMAL LIGHT ILLUMINATED WITH WING ANTI-ICE ACTIVATED. FLIGHT DIVERTED TO DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND RIGHT T-DUCT COUPLING LOOSE AND LEAKING AIR. TIGHTENED COUPLING, OPERATIONAL CHECK GOOD.