As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT FO REMOVED WINDOW SHADE FROM R1 AND IT CREATED SPARKS AND A LITTLE BIT OF SMOKE. RAN QRH, LEFT THE HEAT OFF FOR THAT WINDOW. CB DID NOT POP. INSPECTED FO WINDOW IAW AMM 56-11-00. NO DEFECTS NOTED AND PERFORMED WINDOW HEAT SYSTEM OPS TEST IAW AMM 30-41-00-710-801. OPS TEST NORMAL.