COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 18 Series Aeroplanes AD/BEECH 18/21 Main Landing Gear Walking Beam Upper Attach Bolt - Inspection and Replacement 11/81 Applicability: All models C-45G, TC-45G, C-45H, TC-45H, TC-45J (SNB-5) RC-45J (SNB-5P), D18C, D18S, E18S-9700, G18S, H18, JRB-3N, 3NM and 3TM fitted with Volpar tricycle landing gear. Requirement: 1. Visually inspect the main landing gear walking beam upper attach bolt P/No. AN 179-46A for integrity and adequate installation. 2. Remove AN 179-46A bolt and associated hardware and install NAS 149-80 bolt and associated hardware as specified in "Description of Change" section of Volpar Inc. SB No. 22 dated 1 June 1981. 3. Visually inspect bolt P/No. NAS 149-80 installation for Integrity and replace with like serviceable part as necessary. Note: FAA AD 81-18-07 Amdt. 39-4204 refers. Compliance: 1. Within 10 hours time in service after 25 September 1981. 2. Within 200 hours time in service after 25 September 1981. 3. At intervals not to exceed 3000 hours time in service. Background: Failure of the MLG walking beam upper attach bolt may occur in normal service. Federal Register of Legislative Instruments F2006B03620