As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKEOFF, IN THE CLIMB PHASE OF FLIGHT, THE CAPTAIN`S WINDSCREEN STARTED ARCING ON THE LOWER, RT CORNER AND CONTINUED ALONG THE LOWER PORTION OF THE WINDSCREEN. HEAT WAS TURNED OFF, THE ARCING STOPPED AND THE FLIGHT DIVERTED. HOURS: 23646:16. CYCLES: 18587.