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-2/13 Amdt 1 Rudder Bar Beams - Inspection and Modification NK Applicability: All models with S/Nos. 1-115 not incorporating Mod. No. NB/M/341. Document: Britten-Norman SB No. BN-2/SB.20 Issue 2. Compliance: In accordance with the requirement document.