What was found
DURING PRE-PURCHASE INSPECTION, WINDSHIELDS MEASURED UNDER MINIMUM THICKNESS SPECIFICED BY CESSNA AIRCRAFT. THESE ARE ORIGINAL EQUIPMENT AND MAINTENANCE RECORDS REFLECT NO REPAIRS. ITS IS SUSPECTED UNDER SPEC UNITS WERE INSTALLED NEW AT FACTORY. THIS AIRCRAFT WAS PURCHASED USED FROM CESSNA IN 1989 AND NO REPAIRS WERE ACCOMPLISHED TO UNITS SINCE. RECOMMEND AD NOTE BE ISSUED REQUIRING ONE TIME INSPECTION OF WINDSHIELDS FOR MINIMUM THICKNESS ON ALL 500 SERIES CESSNAS.