COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES SIAI Marchetti S205 and S208 Series Aeroplanes AD/SM-205/35 Landing Gear Actuator Damper 12/93 Applicability: Model S.205-18R, -20R, -22R; S.208 and S.208A. Requirement: Action in accordance with SIAI Marchetti Service Bulletin 205B49 Revision B. Note: RAI AD 93-221 refers. Compliance: For aircraft that have accumulated less than 500 hours time in service: At the 500 hour inspection. For aircraft that have accumulated more than 500 hours time in service: Within 100 hours time in service after 11 November 1993, and thereafter at intervals not to exceed 100 hours time in service. Background: The RAI has received reports of damage to the landing gear actuator rubber damper. Deformation of the rubber damper, in conjunction with a small mis-adjustment of the landing gear system, could result in an unsafe down-lock condition.