What was found
AT CRUISE FLT AT FL380. L SIDE WINDOW HAD STARTED TO DELAMINATE THE HEATING ELEMENT. FOLLOWED QRH CHECKLIST & WINDOW WAS EXTREMELY HOT TO TOUCH AND APPROX 5IN AREA IS AFFECTED. REMOVED AND INSTALLED L2 WINDOW IAW AMM 56-11-02/401 UP TO AND INCLUDING STEP C.8. UNABLE TO GET WINDOW TO LOCK, FURTHER ADJUSTMENT REQUIRED REF AMM 56-11-02/501. R & R M192 WINDOW HEAT CONTROL UNIT. REF AMM 30-41-01. PERFORMED BITE TEST, CHECK GOOD. VERIFIED PROPER INSTALLATION OF ELECTRICAL CONNECTORS. VERIFIED TORQUE OF ELECTRICAL CONNECTORS, AS REQUIRED. REF AMM 56-11-02.