COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 170, 172, F172, FR172 and 175 Series Aeroplanes AD/CESSNA 170/45 Rudder Trim/Nose Gear Steering Bungee 9/81 Applicability: All model 172 RG with S/Nos 172 RG 0001 to 172 RG 0769. Requirement: Replace P/N 2467003-1 rudder trim/nose gear steering bungee with P/N 2467003-6 rudder trim/nose gear steering bungee. Note: FAA AD 81-14-06 Amdt 39-4158 and Cessna Single Engine Service Letter SE 80-99 Rev 1 refer to this subject. Compliance: (a) Before further flight for aircraft experiencing elevator control movement limitation as described in AD/CESSNA 170/44. (b) For aeroplanes with over 150 hours total time in service: within 100 hours time in service after 29 July 1981. (c) For aeroplanes with less than 150 hours after 29 July 1981: prior to the accumulation of 250 hours total time in service. Background: The rudder trim/nose gear steering bungee is replaced with a later design to prevent failure of the jack screw shaft.