As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CRUISE FLIGHT THE RT COCKPIT HEATED WINDSHIELD OUTER GLASS PANE SHATTERED. CABIN PRESSURE WAS REDUCED AND THE CREW ELECTED TO RETURN TO THE AIRPORT WITHOUT ANY FURTHER INCIDENT. MX INSPECTED THE WINDOW AND FOUND NO CAUSE FOR THE BROKEN GLASS PANE. MX HAS SINCE REPLACED THE WINDSHIELD AND THE FAILURE DATA SENT TO THE MFR AS REQUESTED SO THEY CAN INVESTIGATE THE CAUSE.