{"id":"F2006L00415","name":"AD/F2000/4 - Engine Cowls","slug":"ad-f2000-4-engine-cowls","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":117077,"registerId":"commonwealth-F2006L00415-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Dassault Aviation Falcon 2000 Series Aer","sectionType":"division","heading":"Dassault Aviation Falcon 2000 Series Aeroplanes","content":"### Dassault Aviation Falcon 2000 Series Aeroplanes\n\n| AD/F2000/4 | Engine Cowls | 3/2006 |\n| ---------- | ------------ | ------ |\n\n| Applicability: | All Model 2000 aircraft; without Dassault Modification M1486 incorporated in production, or Dassault Service Bulletin F2000-133 incorporated in service. |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with DGAC AD 98-391-006(B).Note: Dassault Service Bulletin F2000-133 refers.                                                        |\n| Compliance:    | Before 31 March 2006, unless already accomplished.                                                                                                       |\n|                | This Airworthiness Directive becomes effective on 16 March 2006.                                                                                         |\n| Background:    | This Directive requires certain improvements in engine cowling security to prevent cowl separation from the aircraft.                                    |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n2 February 2006","sortOrder":0},{"sectionNumber":"AD/F2000/4","sectionType":"part","heading":"AD/F2000/4","content":"## AD/F2000/4","sortOrder":1},{"sectionNumber":"Engine Cowls","sectionType":"part","heading":"Engine Cowls","content":"## Engine Cowls","sortOrder":2},{"sectionNumber":"3/2006","sectionType":"part","heading":"3/2006","content":"## 3/2006","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive as published targets all Model 2000 aircraft lacking Modification M1486 or Service Bulletin F2000-133 and requires compliance with DGAC AD 98-391-006(B). The instrument itself shows no indication that its substantive scope was altered from that directive or original intent."},"complexity_factors":["Cross-reference to external airworthiness directive (DGAC AD 98-391-006(B)) — required actions are not fully described in this text","Dependence on incorporation status of Dassault Modification M1486 or Service Bulletin F2000-133 for applicability","Short compliance window (effective 16 March 2006; comply before 31 March 2006) creating scheduling pressure","Technical nature of required improvements (engine‑cowl security) may require certified maintenance providers and parts","Compliance verification and recordkeeping enforced by CASA (Delegate) — regulatory oversight burden","Potential operational downtime and direct cost to operators for labour, parts and scheduling","Scope limited to a specific aircraft model and modification history, so applicability assessment is required per aircraft","Implementation risk tied to availability of service bulletin parts, qualified technicians and coordination with Dassault documentation","Ambiguity in this notice about precise procedural steps — directs to external DGAC/SB documents for detail"],"plain_english_summary":"This Airworthiness Directive requires operators of Dassault Falcon 2000 aeroplanes that do not have Dassault Modification M1486 or Service Bulletin F2000-133 incorporated to perform specified engine‑cowl security improvements, following DGAC AD 98‑391‑006(B). It became effective 16 March 2006 and must be complied with before 31 March 2006. Operators pay for and arrange the work; the Civil Aviation Safety Authority (Delegate) issued and enforces the directive. The required maintenance action is intended to prevent engine‑cowl separation and will impose direct compliance costs and downtime."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard single-issue Airworthiness Directive with narrow, specific scope (engine cowl security on one aircraft type). It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 2 defined applicability criteria (Modification M1486 and Service Bulletin F2000-133)","Single compliance action (follow DGAC AD 98-391-006(B))","No nested exceptions or conditional logic — straightforward date-based deadline","No internal cross-references to other sections of Australian legislation","Incorporates external technical document by reference (DGAC AD) rather than reproducing requirements"],"plain_english_summary":"This CASA Airworthiness Directive mandates safety modifications to engine cowls on Dassault Falcon 2000 aircraft to prevent cowls coming loose or falling off in flight. It applies to owners/operators whose aircraft have not already received Dassault Modification M1486 or Service Bulletin F2000-133 and requires compliance with DGAC AD 98-391-006(B).\n\nThe AD takes effect 16 March 2006 and the work must be completed by 31 March 2006."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f2000-4-engine-cowls","history":"/api/acts/ad-f2000-4-engine-cowls/history","analysis":"/api/acts/ad-f2000-4-engine-cowls/analysis","conflicts":"/api/acts/ad-f2000-4-engine-cowls/conflicts","importantCases":"/api/acts/ad-f2000-4-engine-cowls/important-cases","documents":"/api/acts/ad-f2000-4-engine-cowls/documents"}}