As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL - THE LEFT SLIDING WINDOW HAD BUBBLES FORMING IN THE LOWER CENTER SECTION. IT WAS ALSO NOTED THAT THE LOWER LEFT CORNER OF THE SLIDING WINDOW WAS EXTREMELY HOT. MAINTENANCE REMOVED AND REPLACED THE LEFT HAND, NUMBER TWO SLIDING WINDOW.