As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT WINDOW HEAT CAUTION MESSAGE ALONG WITH ELECTRICAL SPARKING. SWITCHED WINDOW HEAT OFF AND SHORTLY AFTERWARD, RIGHT SIDE WINDOW SHATTERED. (FLT 6427) REPLACED THE F/O'S SIDE WINDOW IN REF TO AMM. P/N: NP-139322-12 S/N OFF: 05083H4351.