COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Pilatus Britten-Norman BN-2 Series Aeroplanes AD/BN-2/24 Amdt 1 Flap Attachments and Flap Operating Lever - Inspection 3/73 Applicability: All models not incorporating Britten Norman Mod. NB/M/417. Document: Britten Norman SB No. BN-2/SB.36 Issue 3. Compliance: Within 100 hours time in service after 30 March 1973 unless already accomplished.