As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT L3 WINDOW BECAME TOO HOT THAT UNABLE TO TOUCH. FOUND 5 & HALF INCH LENGTH AND 2 INCH WIDTH OF MILKY WHITE FILM CAN BE SEEN ON THE FWD OF THE WINDOW. 2 INCH DELAMINATION ALONG THE MILKY FILM. THE WINDOW NEEDS TO BE CHANGED IAW MM. USED JAL NON PARTS, SN05210 H7402. NEED TO RETURN WITHIN 3DAYS. REPLACED L3 WINDOW IAW MM. LEAK CHK FINE, WZ 3.0 D-PRESS. NO AIR LEAK. CONFIRMED WINDOW GAP SEALANT WAS CURED.