{"id":"F2006B09325","name":"AD/ECUREUIL/102 - Hydraulic System Cut Off","slug":"ad-ecureuil-102-hydraulic-system-cut-off","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53481,"registerId":"commonwealth-F2006B09325-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\nFor 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.\n\n![](image.001.png)  \n\nEurocopter AS 350 (Ecureuil) Series Helicopters","sortOrder":0},{"sectionNumber":"AD/ECUREUIL/102 Hydraulic System Cut Off","sectionType":"part","heading":"AD/ECUREUIL/102 Hydraulic System Cut Off 10/2004","content":"# AD/ECUREUIL/102 Hydraulic System Cut Off 10/2004\n\nApplicability: AS 350 helicopters, Versions B, B1, B2, B3, BA, BB and D, pre Modification 073263.\n\nRequirement: Modify the electrical wiring, in accordance with paragraphs 2.A., 2.B. and 2.C. of Eurocopter AS 350 Alert Service Bulletin No. 29.00.07. or later revision approved by the French DGAC.\n\nNote: DGAC AD F-2004-089 refers.\n\nCompliance: Before 31 December 2004.\n\nThis Airworthiness Directive becomes effective on 30 September 2004.\n\nBackground: The actions required by this Directive are designed to eliminate the possibility of a load unbalance in the flight controls. This unbalance may occur after the loss of hydraulic assistance following a hydraulic failure.\n\n![Signature of Bernard Malcolm Hole, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\nBernard Malcolm Hole\n\nDelegate of the Civil Aviation Safety Authority 30 July 2004\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 8 September 2004.","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive's scope is consistent with its stated aim: require a wiring modification for specified AS350 variants pre‑Mod 073263 to eliminate the risk of load unbalance after loss of hydraulic assistance. It references and defers to the Eurocopter service bulletin and DGAC approval but does not expand applicability beyond the identified aircraft or add unrelated requirements."},"complexity_factors":["Technical requirement to modify aircraft electrical wiring to address hydraulic‑failure load unbalance (requires certified maintenance personnel and parts).","Cross‑references to an external Airworthiness/Alert Service Bulletin (Eurocopter AS 350 Alert Service Bulletin No. 29.00.07, paras 2.A–2.C) rather than full instructions embedded in the AD.","Permits use of later revisions only if approved by the French DGAC (dependent on another regulator's approvals).","Limited applicability tied to specific AS350 variants and only those pre Modification 073263 (requires fleet records checks).","Fixed compliance deadline (before 31 December 2004) and an effective date, creating a time‑bound operational burden for owners/operators.","Issued under CASR subregulation 39.1(1) by a CASA delegate, imposing mandatory regulatory enforcement and potential oversight/compliance actions."],"plain_english_summary":"Requires owners/operators of Eurocopter AS350 helicopters (versions B, B1, B2, B3, BA, BB and D) that have not received Modification 073263 to modify their electrical wiring in accordance with Eurocopter Alert Service Bulletin paragraphs 2.A–2.C or a later DGAC‑approved revision. The measure, issued by the CASA delegate, aims to remove the risk of flight‑control load unbalance after hydraulic failure. Compliance must be completed by 31 December 2004; costs and installation scheduling fall to aircraft owners/operators."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope: mandating a specific wiring modification to address a known unsafe condition in particular helicopter models. There is no evidence of scope creep; it targets exactly the safety issue identified (hydraulic failure leading to flight control imbalance) without expanding into unrelated operational or maintenance requirements."},"complexity_factors":["Single, clearly defined applicability (specific helicopter models by version)","Single requirement referencing an external technical document (Eurocopter Service Bulletin)","Simple compliance deadline with no conditional triggers or phased implementation","No defined terms section or complex interpretation provisions","Minimal cross-referencing (only one external AD reference in a note)","Straightforward background explaining the safety rationale in plain language"],"plain_english_summary":"CASA ordered owners/operators of Eurocopter AS350 (B, B1, B2, B3, BA, BB, D) helicopters without factory Mod 073263 to modify electrical wiring per Eurocopter Alert Service Bulletin No. 29.00.07 (or later) to prevent loss of control following a hydraulic failure. The safety order took effect 30 September 2004 and required completion by 31 December 2004."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-ecureuil-102-hydraulic-system-cut-off","history":"/api/acts/ad-ecureuil-102-hydraulic-system-cut-off/history","analysis":"/api/acts/ad-ecureuil-102-hydraulic-system-cut-off/analysis","conflicts":"/api/acts/ad-ecureuil-102-hydraulic-system-cut-off/conflicts","importantCases":"/api/acts/ad-ecureuil-102-hydraulic-system-cut-off/important-cases","documents":"/api/acts/ad-ecureuil-102-hydraulic-system-cut-off/documents"}}