As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI IN, A STRONG ELEC BURNING SMELL OF INSULATION & A GLOWING ORANGE EMBER DROPPED FROM ABOVE R2 WINDOW & FELL IN CUP HOLDER. WIRES APPEARED BLACK & BURNED. WINDOW HEAT TURNED OFF. R & R R2 WINDOW HARNESS IAW WDM 30-41-11 & AMM 56-11-00. PERFORMED TEST IAW AMM 30-41-0 & OPERATIONAL CHECK IAW WDM 30-41-11. SYS CHECKED NORMAL.