As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED TO DEPARTURE DUE TO AN ACRID ODOR IN THE FLIGHT DECK REPORTED TO BE FROM THE F/O'S WINDSHIELD. MAINTENANCE FOUND TERMINAL BLOCK R5-38 AND THE F/O'S WINDSHIELD BURNED AT CONNECTION P WHICH IS THE GROUND SIDE FOR WINDOW ANTI-ICE. THE TERMINAL BLOCK, WINDOW, AND WINDOW HEAT CONTROLLER WERE REMOVED AND REPLACED. THE AIRCRAFT WAS RETURNED TO SERVICE.