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-2/47 Wing Tip Tank Selector Switches - Modification 5/83 Applicability: All models fitted with wing tip tanks. Document: Britten Norman SB No. BN-2/SB 157. Compliance: Before further flight after 31st Dec. 1983. Background: Arising from recommendations contained in the reports of two accidents, the wing tip fuel tank selector switches, system placarding, and selection indicator lamps have been changed by the aircraft manufacturer.