As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT WINDSHIELD (PILOTS) OUTER-PLY CRACKED DURING FLIGHT. NO KNOWN CAUSE AS TO THE EVENTS OF THE CRACK. KNOWN TO BE A COMMON FAILURE ON CHALLENGER ACRYLIC WINDSHIELD AND SIDE WINDOWS. WHETHER DUE TO IMPACT OF SOME SORTS OR WINDSHIELD HEAT FAILURE OR DELAMINATION. WINDSHIELD WAS REMOVED AND REPLACED WITH A NEW WINDSHIELD AND AC WAS RETURNED AS AIRWORTHY. (K)