AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section. Eurocopter BO 105 Series Helicopters AD/BO 105/25 State of Design Airworthiness Directives 11/2007 Applicability: Eurocopter BO 105 helicopters. Requirement: 1. Determine the applicability of the German Luftfahrt-Bundesamt (LBA) in Table 1 and Transport Canada Aviation (TCA) Airworthiness Directives (AD) listed in Table 2 of this AD. 2. If it is determined that a LBA or TCA AD is applicable and has not been previously accomplished, perform the actions required by that AD. Table 1 LBA AD Effective Date Title 75-103 21 May 1975 Quadruple Nuts - Main Rotor Head 75-106/2 16 June 1975 Hose Assemblies 75-170/2 17 September 1975 Quadruple Nuts and Bolts - Main Rotor Head 75-171 5 August 1975 Power Supply System Connector Plugs 75-191/2 1 October 1975 Load hook Release Wiring 75-238 27 October 1975 Right Outboard Engine Mount Flange 76-136/2 5 October 1978 Gearbox Supports - Service Life 76-255/2 4 October 1976 Dual Hydraulic Booster 76-256/3 19 February 1980 Rotor Brake 77-306 12 December 1977 Input Shaft and Ram Air Ventilation 78-257 18 October 1978 Dual Hydraulic System Selector Valves 78-295/2 21 January 1980 Tail Rotor Blades and Tail Rotor Heads 79-135 20 March 1979 Main Rotor Transmission Bearings 79-136 14 March 1979 Exhaust Pipe Clamps 79-137 16 March 1979 Drive Shaft Fairing - Asbestos Cloth 79-234 17 May 1979 Tail Rotor Control Linkage 79-235/2 18 October 1979 Dual Hydraulic Booster System 79-444 17 October 1979 Engine Cowling Fire Protection Paint 80-95/2 11 June 1980 Bendix Drive Shaft 80-208 27 August 1980 Main Gearbox Freewheel Shaft 83-124/2 30 October 1984 Tandem Hydraulic Units 84-128 6 August 1984 Tail Rotor Blades 84-177/2 14 January 1984 Cargo Hook 84-178 5 November 1984 Vertical Fin 85-50 18 February 1985 Control Rods Table 2 TCA AD Effective Date Title CF-91-41 1 February 1992 Torque Indication Hose CF-93-06 30 April 1993 Continuous Ignition System Note: LBA ADs can be accessed at the following URLs: http://www2.lba.de/dokumente/ad/html/ads-eurocopter/3025-bo105.htm http://www2.lba.de/dokumente/ad/html/ads-eurocopter/3058-bo-105-lsa3.htm TC ADs can be accessed at the following URL: http://www.tc.gc.ca/aviation/applications/cawis-swimn/awd-lv-cs1401.asp?rand Compliance: For Requirement 1 - Within 30 days after the effective date of this AD or prior to the issue of a certificate of airworthiness, whichever occurs later. For Requirement 2 - Within 12 months from the effective date of this Directive. This Airworthiness Directive becomes effective on 25 October 2007. Background: The LBA and TCA ADs listed in Table 1 and 2 of this Directive require one time actions for which the compliance date and/or period has passed. CASA has determined that these ADs may be applicable to recently registered Australian aircraft. This Directive is issued to ensure all State of Design ADs are complied with. Charles Lenarcic Delegate of the Civil Aviation Safety Authority 29 August 2007