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 60/28 Wing Strobe Lights 10/76 Applicability: All models 60 and A60, S/Nos. P-3 thru P-222; that have either Hoskins P/N 30- 0187-21 or Grimes P/N 30-0669-1 wing strobe light installed. Requirement: Action in accordance with Beechcraft SI No. 0800-362. Compliance: Within 100 hours' time in service after 29 October 1976.