As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, THE CO-PILOT NOTICED THE SLIDING WINDOW ON THE RIGHT SIDE HAD DETACHED FROM THE AIRCRAFT AND WAS MISSING. LANDING WAS NORMAL. REMOVED REMAINING SECTION OF WINDOW ASSY . REPLACED THE WINDOW AND BROKEN RETAINER IAW SRM 4045-31E CH 52 , REINSTALLED WINDOW.