As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DURING FLIGHT R1 WINDSHIELD BEGAN ARCING AT TOP LEFT INPUT AREA, THEN ENTIRE SURFACE SHATTERED WITH LOUD "POP" SOUND. DECESION MADE TO DIVERT TO JFK AN EMERGENCY WAS DECLARED AND LANDED OVERWEIGHT WITHOUT INCIDENT. MAINTENANCE REPLACED R1 WINDSHIELD IAW AMM 56-11-01.