As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WINDOW EICAS MESSAGE DISPLAYED. INOPERATIVE LIGHT ILLUMINATED, INOPERATIVE LIGHT DID NOT EXTINGUISH WHEN SWITCH WAS CYCLED TO OFF THEN ON. FOUND L3 WINDOW AT FAULT AND 6 INCHES ARCING FROM INTERNALLY FROM BUSS BAR. REPLACED L3 CAPTAIN`S WINDOW. RESET ALL BREAKERS, OPS TESTED OK ON ALL WINDOW HEAT AND ON CONTROLLER.