COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety 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 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. Cessna 750 (Citation X) Series Aeroplanes AD/CESSNA 750/1 Bulkhead Web Doubler 9/2004 Applicability: Model 750 aircraft, serial numbers 0001 through 0102. Requirement: 1. Inspect the bulkhead web for an existing round bulkhead web doubler, in accordance with the Accomplishment Instructions of Cessna Service Bulletin SB750-53-19, dated 20 January 2000. If there is a round bulkhead web doubler having part number 6711093-38, before further flight, remove the doubler in accordance with the Requirement document. 2. Install a new right bulkhead web doubler having part number 6791213-4 and a left bulkhead web doubler having part number 6791213-3 and enlarge the lightening holes, in accordance with the Accomplishment Instructions of Cessna Service Bulletin SB750-53-19. Note: FAA AD 2001-07-04 Amdt 39-12169 refers. Compliance: Before 30 September 2004, unless already accomplished. This Airworthiness Directive becomes effective on 2 September 2004. Background: This Directive requires removal of a certain existing bulkhead web doubler, installation of left and right bulkhead web doublers, and enlargement of the lightening holes. This action is necessary to prevent jamming of the roll control system, due to inadequate clearance between the control cable and web. David Villiers Delegate of the Civil Aviation Safety Authority 13 July 2004 The above AD is notified in the Commonwealth of Australia Gazette on 11 August 2004. Page 1 of 1