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-2/54 Pilots Switch Panel 9/91 Applicability: All models BN2 Islander, 2T Turbine Islander Series Aircraft. Requirement: Action in accordance with the Technical Requirements of Pilatus Britten-Norman SB BN-2/SB.202. Note: Compliance with this SB is classified Mandatory by the UK CAA. Compliance: Prior to 5 November 1991. Background: Investigation has revealed the possibility of an electrical short circuit accidentally occurring between adjacent switches behind the pilots switch panel.