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. Harbin Y12 Series Aeroplanes AD/Y12/10 Flap Motoreducer 3/2003 Applicability: Y12 aeroplanes listed in Harbin Aircraft Manufacturing Corporation Service Bulletin (SB) Y12-27-0035 dated 3 August 1992. Requirement: If not previously accomplished, modify the flap motoreducer and its installation in accordance with SB Y12-27-0035. This modification should be incorporated in conjunction with the modification to the central control pedestal, SB Y12-76-0036 and AD/Y12/9 refers. Note: China CAAC AD CAD92-Y012-03 Amdt 39-0810 refers. Compliance: Before 30 June 2003. This Airworthiness Directive becomes effective on 20 March 2003. Background: This Directive requires the installation of a new, safer and more reliable flap motoreducer system. James Coyne Delegate of the Civil Aviation Safety Authority 3 February 2003 The above AD is notified in the Commonwealth of Australia Gazette on 26 February 2003. Page 1 of 1