As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING LANDING IN PITTSBURGH FLIGHT 3706, EXPERIENCED A LARGE SPARK FROM BEHIND THE CAUTION PANEL. PILOT SUSPECTED IT TO HAVE COME FROM THE RIGHT WINDSHIELD HEAT TERMINAL BOARD. MAINTENANCE WAS NOTIFIED AND FOUND THE FIRST OFFICERS TERMINAL TO BE AT FAULT. THE AFFECTED TERMINAL WAS ISOLATED WITH HEAT SHRINK AS AN INTERIM REPAIR. AIRCRAFT WAS RETURNED TO SERVICE.