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/F2000/11 Flap Jackscrew 5/2006 Applicability: Dassault Falcon 2000 aeroplanes. Requirement: 1. Carry out a check of the flap asymmetry protection system in accordance with Maintenance Manual (MM) procedure 27-502. 2. Carry out a check of the inboard flap jackscrews P/N 5318-1 new or revised (see note) nut/screw play. 3. Replace the inboard flap inboard jackscrews P/N 5318-1 new or revised. 4. Replace the inboard flap outboard jackscrews P/N 5318-1 new or revised. 5. Do not swap actuators between inboard flap inboard position and the inboard flap outboard position. 6. Carry out a check of the outboard jackscrews (P/N 1-5319-1 (LH), 2-5319-1 (RH)) and outboard jackscrews (P/N 5318-1) nut/screw play in accordance with MM procedure 27-504. Note 1: Jackscrews P/N 5318-1 can be revised only one time according to service bulletin AVIAC 5318-27-01. They are identified by amendment a and letter R engraved after the serial number. Note 2: P/N 5318-1 jackscrews can be replaced by P/N 5318-2 or -3 whose limitations are detailed in MM chapter 5.40. Note 3: DGAC AD 1999-038-008(B) R1 refers. Compliance: 1. Within 5 flights after the effective date of this AD unless previously accomplished, thereafter at intervals not to exceed 330 flight hours or 7 months, whichever occurs first. 2. Within 25 flights after the effective date of this AD for jackscrews that accumulated more than 750 flights, unless previously accomplished. 3. Within 25 flights after the effective date of this AD for jackscrews that accumulated more than 1000 flights, unless previously accomplished. 4. Within 25 flights after the effective date of this AD for jackscrews that accumulated more than 2200 flights, unless previously accomplished. 5. From the effective date of this AD. 6. Within 25 flights after the effective date of this AD for jackscrews that accumulated more than 1000 flights, unless previously accomplished, thereafter at intervals not to exceed 330 flight hours or 7 months, whichever occurs first. This Airworthiness Directive becomes effective on 11 May 2006. Background: Flap jackscrew jamming can cause an asymmetric flap situation which will result in reduced roll control of the aeroplane. James Coyne Delegate of the Civil Aviation Safety Authority 17 March 2006