As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPPER RIGHT PORTION OF FLIGHT OFFICERS WINDSHIELD STARTED ARCING DURING CRUISE. CIRCUIT BREAKER Z24 WAS PULLED IAW QRH PROCEDURE ANTI FOG SYSTEM WAS OFF. ARCING DAMAGE CONSISTS OF SNAKE 3 TO 4 INCHES LONG AT THE TOP OF THE WINDSHIELD AND DOES NOT OBSTRUCT VIEWING. THE AIRCRAFT WAS GROUNDED. REPLACED RIGHT WINDSHIELD IAW AMM 56-10-02. OPS CHECKED NORMAL.