What was found
IN CRUISE, 41,000FT (8.5PSID), -60C, ARCING AND SMOLDERING OBSERVED FROM MID BOTTOM OF WINDOW PROPAGATING UP TO TOP FWD EDGE OF RT NR 2 SLIDING WINDOW. WINDOW HEAT, RT, SIDE SWITCH SELECTED OFF. WHILE QRH CONSULTED, AS WINDOW COOLED, CRACKING OBSERVED ON OUTER PANE ONLY THROUGHOUT THE WINDOW AREA. QRH STATES NO FURTHER ACTION REQUIRED DUE OUTER PANE NOT PRIMARY STRUCTURAL SUPPORT. FLIGHT CONTINUED AT 41,000 FT FOR NEXT 20 MINS TO TOP OF DESCENT. LANDING CARRIED OUT NORMALLY. WINDOW ASSY REPLACED..