As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 6537967) VERY BRIGHT ELECTRICAL ARCK ACROSS L - FWD WINDO TOP PORTION. GLOWING CIRCLE WHER I PLACED TAPE ON WINDSHIELD TURNED OFF L-FWD WINDOW HEAT RED GLOW INEDIATELY WENT OUT. DMVD NO. 1 WINDOW PER B737 AMM 56-11-11. ALL PARTS AND HDWR BAGGED AND TAGGED. VERIFIED EFFECTIVELTY OF NOW WINDOW. R/R RT WINDOW HEAT CONT. REF B737 AMM 30-41. OS CKS GOOD.