As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: CAPT. L1 WINDOW WAS OBSERVED ARCING ON LOWER CENTER EDGE DURING CRUISE, ALSO NOTED DELAMINATION OR POSSIBLE CRACK AT LOWER RIGHT EDGE OF L1 WINDOW.REPLACED WINDOW AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER TASK CARD 56-94-01.