COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES 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 39.1 (1) of CAR 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. Bombardier (Boeing Canada/de Havilland) DHC-8 Series Aeroplanes AD/DHC-8/89 Aileron Tab Actuator Arms 10/2002 Applicability: Model 102, 103, and 106 aircraft, serial numbers 3 through 119; without Modification 8/0864 incorporated. Requirement: Visually inspect the actuator arm channel of the left and right aileron tabs for cracks in accordance with the Special Inspection Procedure contained in the Accomplishment Instructions of Bombardier Service Bulletin 8-57-7, Revision F, dated 27 March 2002. Before further flight, repair any cracked aileron tab actuator arm channel by installing a new channel reinforcing angle and balance weight arm, in accordance with Part A of the Requirement document Accomplishment Instructions. Note 1: Incorporation of Bombardier Modification 8/0864 terminates the repeat inspection requirement of this Directive. Note 2: Transport Canada AD CF-2002-29 refers. Compliance: Within 500 flight hours after 3 October 2002. Thereafter at intervals not to exceed 500 flight hours. This Airworthiness Directive becomes effective on 3 October 2002. Background: Transport Canada received reports of cracked aileron tab actuator arms. Failure of the aileron tab actuator arms will result in increased roll control forces that might be interpreted by the pilot as a flight control problem. David Alan Villiers Delegate of the Civil Aviation Safety Authority 22 August 2002 The above AD is notified in the Commonwealth of Australia Gazette on 11 September 2002. Page 1 of 1