As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R1 WINDSCREEN HAD ARCING AND POSSIBLE FIRE. MTC IN PROGRESS ON WINDSCREEN CHANGE AND CONTROLLER REMOVED AND REPLACED. REMOVED RT FWD FLT DECK WINDOW IAW MM56-11-01 INSTALLED RT F WINDOW BORROWED FROM UA IAW 56-11-01-400-801 UP TO AND INCLUDING ITEM 4 PAGE 6 R KING 307322 RETURNED A/C TO NORMA PERF WINDOW HEAT OPS CHK IAW 30-41-00 SEE ITEM 006 FOR TERMINAL REWORK AND 007 POST CHECK ETOPS CATEGORY (B): DIVERSION OR TURNBACK.