As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL 260 LEFT SIDE WINDOW "OVERHEAT" LIGHT ILLUMINATED FOLLOWED BY ELECTRICAL ARCING ON L2 WINDOW FOLLOWED BY L2 CRACKING OUTER PANE. DIVERSION TIME: 2 HOURS. REPLACED LT NR 2 SLIDING WINDOW PER AMM 56 12 11 400 801, OPERATION CHECK NORMAL.