As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2133, BOS-LGA - CAPTAINS WINDSCREEN SHATTERED IN FLIGHT. THE FLIGHT DECLARED AN EMERGENCY AND RETURNED TO BOS. THE FLIGHT LANDED WITHOUT ANY FURTHER ISSUES. MAINTENANCE REPLACED THE CAPTAINS WINDSHIELD. ALSO REMOVED AND RE-INSTALLED THE CAPTAINS WINDSHIELD WIPER TO FACILITATE WINDSHIELD CHANGE.