COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES DHC-3 (Otter) Series Aeroplanes AD/DHC-3/23 VNE Placard 8/68 Applicability: All models not incorporating De Havilland Canada Modification No 3/909. Requirement: Placard the airspeed indicator to show a never exceed speed (Vne) of 130 knots. Compliance: Within 10 hours time in service after 6 September 1968.