As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JAX - FLT 1464 - WHILE AT FL 370, THE FIRST OFFICER'S WINDSHIELD CRACKED. THE FLIGHT CREW DONNED THEIR OXYGEN MASKS AND DESCENEDED TO FL 100. AN EMERGENCY WAS DECLARED AND THE FLIGHT DIVERTED TO JAX WHERE A ROUTINE LANDING WAS MADE. MAINTENANCE REPLACED THE FIRST OFFICER'S WINDSHIELD. (X)