{"id":"F2008L00395","name":"AD/F2000/29 - Generator Control Unit Wiring","slug":"ad-f2000-29-generator-control-unit-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":119044,"registerId":"commonwealth-F2008L00395-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/F2000/29 | Generator Control Unit Wiring | 3/2008 |\n| ----------- | ----------------------------- | ------ |\n\n| Applicability: | Falcon 2000EX aircraft from serial number 1 to 107 inclusive, which have not been modified by Dassault Aviation Falcon Service Bulletin (SB) F2000EX-141 dated16 February 2007 or Revision 1 dated 26 November 2007. |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | Modify the Generator Control Units (GCU) electrical wiring as instructed in the accomplishment instructions of SB F2000EX-141 or later EASA approved revision. |\n| | Note: EASA AD 2007-0290 refers. |\n| Compliance: | Within the next 13 months after the effective date of this Directive. |\n| | This Airworthiness Directive becomes effective on 13 March 2008. |\n| Background: | The European Aviation Safety Agency has advised that during an approach, a Falcon 2000EX operator experienced a temporary loss of the four Electronic Flight Instrumentation System (EFIS) display units followed by a consecutive restart of the avionics. During initial investigation, a loose connection on the DC load distribution system was discovered and determined to be the root cause of this event.However, further analysis indicated that large electrical transients on the essential bus bar may possibly cause simultaneous and temporary power shortage on both sides of the electrical system.This Directive requires a wiring modification of the GCUs to increase the electrical system robustness. This action is necessary to prevent a momentary loss of data on the EFIS screens, which could lead to the pilot's loss of situational awareness during initial climb or approach/landing and could possibly result in reduced control of the aeroplane. |\n\n![](image.001.png) \nCharles Lenarcic \nDelegate of the Civil Aviation Safety Authority\n\n23 January 2008","sortOrder":0},{"sectionNumber":"AD/F2000/29","sectionType":"part","heading":"AD/F2000/29","content":"## AD/F2000/29","sortOrder":1},{"sectionNumber":"Generator Control Unit Wiring","sectionType":"part","heading":"Generator Control Unit Wiring","content":"## Generator Control Unit Wiring","sortOrder":2},{"sectionNumber":"3/2008","sectionType":"part","heading":"3/2008","content":"## 3/2008","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific safety-of-flight issue with a specific aircraft type. The scope remains precisely limited to the identified electrical system vulnerability and the affected serial number range."},"complexity_factors":["Single, clearly defined applicability criterion (serial number range plus exemption for already-modified aircraft)","Single, unambiguous compliance action (follow the service bulletin)","Simple deadline calculation (13 months from effective date)","No defined terms section, no cross-references to other legislation, no conditional logic or nested exceptions","Total length is approximately 250 words of substantive content"],"plain_english_summary":"This CASA Airworthiness Directive orders owners/operators of Dassault Falcon 2000EX jets (serials 1–107) to modify Generator Control Unit wiring per Dassault SB F2000EX‑141 (or later approved) unless already done. The fix prevents power surges from causing a simultaneous temporary loss of all main flight displays, averting critical instrument blackout during takeoff or landing."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope remains narrowly focused: a mandatory wiring modification for Falcon 2000EX serials 1–107 that have not already received SB F2000EX-141. The Directive does not broaden applicability to other models or add recurring obligations; it requires a single mandated modification to increase electrical robustness (see Applicability and Requirement)."},"complexity_factors":["Targeted applicability (only Falcon 2000EX serials 1–107, with an exclusion if SB F2000EX-141 already implemented) (Applicability).","Technical nature: requires avionics wiring modification to the GCUs per manufacturer service bulletin, so certified maintenance providers and parts are needed (Requirement).","One-off compliance action with a fixed 13‑month deadline creates scheduling and operational downtime pressures for operators (Compliance).","Regulatory linkage to EASA AD 2007-0290 and allowance for later EASA-approved SB revisions introduces dependence on external approvals (Requirement; Note).","Cost and compliance burden fall to aircraft owners/operators; CASA/Delegate issued the directive and sets the effective date (Compliance; signature block).","Relatively narrow scope and clear remedy reduce legal drafting complexity but raise practical logistics complexity for maintenance planning."],"plain_english_summary":"Requires Falcon 2000EX aeroplanes serials 1–107 (unless already modified by Dassault SB F2000EX-141) to have the Generator Control Unit wiring modified per SB F2000EX-141 or a later EASA‑approved revision, to be completed within 13 months. Owners/operators must arrange and fund the modification; CASA made the Directive effective 13 March 2008. The stated aim is to increase electrical-system robustness to prevent transient-induced temporary loss of EFIS displays during critical flight phases such as approach or initial climb."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f2000-29-generator-control-unit-wiring","history":"/api/acts/ad-f2000-29-generator-control-unit-wiring/history","analysis":"/api/acts/ad-f2000-29-generator-control-unit-wiring/analysis","conflicts":"/api/acts/ad-f2000-29-generator-control-unit-wiring/conflicts","importantCases":"/api/acts/ad-f2000-29-generator-control-unit-wiring/important-cases","documents":"/api/acts/ad-f2000-29-generator-control-unit-wiring/documents"}}