As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PART 135 FLIGHT AIRCRAFT PILOTS SIDE FORWARD WINDSCREEN OUTER PANEL SHATTERED IN FLIGHT. FLIGHT CREW DIVERTED AND LANDED SAFELY. CAUSE OF FAILURE; INTERNAL SEAL AROUND THE WINDSCREEN ALLOWING WATER INTO WINDSCREEN HEATING ELEMENT WHICH SHORTED OUT, CAUSING HOT SPOT AND ULTIMATELY SHATTERING THE WINDSCREEN OUTER PANEL. AIRCRAFT MFG TEXTRON AND WINDOW MFG PPG HAVE NOT INVESTIGATED OR DETERMINED THE CAUSE OF THIS OR NUMEROUS OTHER COCKPIT WINDOW SHATTERING EVENTS.