COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Short SD3-30 Series Aeroplanes AD/SD3-30/3 Engine Power Levers - Modification 11/81 Applicability: Model SD3-30 with S/Nos. SH3002 to SH3068. Document: Shorts SB No. SD3-76-01. Compliance: Before 1 April 1982. Background: Modification of the engine power lever cam mechanism will inhibit take-off with the flight control locks still engaged.