What was found
UPON INSPECTION OF THE WING ATTACH A-BOLT, NOTED THE WASHER LISTED IN THE PARTS MANUAL, AN 960-C616, PAGE I-53-2, IS INCORRECT IN SIZE AND WILL ALLOW THE BOLT TO PULL THROUGH THE ATTACH BRACKET. THE PROPER BOLT, P/N MS 16212-13, WAS OBTAINED THROUGH DIAMOND ACFT AND WAS INSTALLED. SUBMITTER STATED A MANDATORY INSPECTION IS NEEEDED AS SOON AS POSSIBLE TO ENSURE ALL ACFT HAVE THE CORRECT PART INSTALLED.