As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R2 WINDOW, RT SIDE, OVERHEAT LIGHT ILLUMINATED IN DESCENT THRU FL 300 .78M APPLIED QRH PROCEDURE OVERHEAT WOULD NOT RESET. ACFT GROUNDED. REPLACED RT NR 2 WINDOW HEAT CONTROLLER REF MM 30-41-11 FOUND WINDOW HEAT POWER RT SIDE OPEN RESET CB REF 20-60-01.