What was found
AT CRUISE: FL350 - MASTER CAUTION - ANTI-ICE ILLUMINATED COMPLETED QRH FOR WINDOW OVERHEAT CAUTION LIGHT R1 WINDOW - WHEN WINDOW HEAT SWITCH WAS TURNED OFF - THE ON LIGHT WAS NOT ILLUMINATED. WE NOTICED AN ELECTRICAL LIKE DISCOLORATION AT WINDOW CONTACT POINT FOLLOWED BY A SERIES OF CRACKS IN THE UPPER LEFT CORNER OF THE WINDOW. THE QRH FOR CRACKED WINDOW WAS COMPLETED - OUTER PANEL DAMAGE. GROUNDED - YES. INSTALLED MIG 2C 40-0021820-20-21 REMOVED THE NO 1 F/O WINDOW REF B737-800 AMM 56-11-11-000-802 PULLED AND COLLARD 6 C/B'S 51122 11/17/2021 INSTALLED WINDOW PER SUB TASK 56-11-11-950-007 WINDOW REQUIRES OPS CHECK 78978 RII INSPECTION BY YC 79520 PERFORMED CABIN PRESSURE LEAK CK PER AMM 05-51-91 NO LEAKS NOTED. DIVERSION TIME - 57 MINUTES