As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ARCING AND BURNED SMELL COMING FROM THE LOWER FRONT RT CORNER OF F/O R2 WINDOW. ACFT GROUNDED. R & R R2 WINDOW. OPS CHECK OF WINDOW HEAT GOOD. PRESSURIZED ACFT TO 3.0 PSI NO LEAKS NOTED, REF AMM 56-12-11-820-801, 56-12-11-400-801 AND REF 21-31-00.