As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DTW - FLT 0366 - EN ROUTE ORD/LGA DURING CRUISE, PASSENGER SEATED AT 12A REPORTED POPPING SOUND AND OUTER WINDOW PANEL WAS NOTED TO HAVE VERTICAL CRACK EXTENDING UP FROM LOWER AFT CORNER OF WINDOW. AIRCRAFT DIVERTED TO DTW AND LANDED WITHOUT INCIDENT. REPLACED WINDOW PANEL ASSEMBLY BY PASSENGER SEAT 12A. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)