What was found
BGR - FLT 4628 - DURING FLIGHT, THE LEFT FRONT WINDSHIELD HEAT FAILED AND THE AIRCRAFT DIVERTED TO BGR. MAINTENANCE FOUND RELAY 19HF, WHICH PROVIDES HEAT CONTROL, TO BE AT FAULT. AFTER REPLACEMENT OF THE RELAY, MAINTENANCE PERFORMED AN OPERATIONAL CHECK OF THE SYSTEM AND RETURNED THE AIRCRAFT TO SERVICE. (M)