COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Short SD3-60 Series Aeroplanes AD/SD3-60/17 Nose Landing Gear Main Fitting 8/86 Applicability: All model SD3-60 with units referenced in Dowty Service Bulletin No. 32-45SD. Requirement: Action in accordance with Dowty S.B. No. 32-45SD. Compliance: As per Requirement Document. Background: The manufacturer reports premature wear of the ferobestos bearing has caused wear in the bore of the nose undercarriage main fitting.