As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 5148504) PILOT SIDE WINDOW STARTED HAVING ELECTRICAL SPARKLES ALONG THE FWD EDGE--BUBBLE APPEARED IN OUTER PANE TURNED OFF WINDOW HEAT FOR THAT WINDOW R/R LEFT SIDE WINDOW HEAT CONREOLLER PER B737 AMM 30-41-R/R LEFT SIDE WINDOW PER B737 AMM 56-12. OPS AND LEAK CKS OK.