COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 60 (Duke) Series Aeroplanes AD/BEECH 60/27 Amdt 1 Strobe Light Bounding Straps 11/74 Applicability: All model A60 & B60, S/Nos. P-223 thru P-307, P-309 and P-310, fitted with Grimes P/N 30-0467-1 or Grimes P/N 30-0467-3 strobe light assemblies. Requirement: Action in accordance with Beechcraft SI No. 0655-362, Rev. 1. Compliance: Within 100 hours' time in service after 31 January 1975.