COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES British Aerospace (Hawker Siddeley) HS 748 Series Aeroplanes 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. AD/HS 748/26 Underfloor Flying Control Circuits Forward of STA 252F Applicability: All HS 748 series aircraft. 4/2000 Requirement: Inspect in accordance with BAe Regional Aircraft Mandatory Service Bulletin HS748-27-133. Compliance: Before 31 January 2001. This Airworthiness Directive becomes effective on 20 April 2000. Background: An incident report was received by the manufacturer of a flying control restriction. Investigation revealed reduced flying control clearances and signs of rubbing contact between elements of the control circuits and aircraft structure. Trapped debris was also found which had the potential for restricting and jamming control circuits. Bernard Malcolm Hole Delegate of the Civil Aviation Safety Authority 9 March 2000 The above AD is notified in the Commonwealth of Australia Gazette on 22 March 2000.