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. Dassault Aviation Falcon 2000 Series Aeroplanes AD/F2000/5 Engine Nacelle Firewalls 3/2006 Applicability: Model 2000 aircraft; except for aircraft with Dassault Aviation Service Bulletin No. F2000-248 incorporated in service or Dassault Aviation modification M2111 incorporated in production. Requirement: Action in accordance with DGAC AD 2002-413(B). Note: Dassault Aviation Service Bulletin F2000-248 refers. Compliance: Before 31 March 2006, unless already accomplished. This Airworthiness Directive becomes effective on 16 March 2006. Background: The manufacturer has determined that two manufacturing holes have not been plugged in the left and right engine masts firewalls. In the case of significant fuel leakage at the fuselage-nacelle connection, fuel could drain to a hot zone area. David Villiers Delegate of the Civil Aviation Safety Authority 2 February 2006