{"id":"F2006B07904","name":"Airworthiness Directives 2004 - Revocation and Remaking - Hydraulic Equipment","slug":"airworthiness-directives-2004-revocation-and-remaking-hydraulic-equipment","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50926,"registerId":"commonwealth-F2006B07904-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"Airworthiness Directives 2004 - Revocation and Remaking - Hydraulic Equipment","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 20.2\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\n Airworthiness Directives 2004\n\n I, DAVID ALAN VILLIERS, delegate of the Civil Aviation Safety\n\n Authority, acting under subregulation 39.001 (1) of the Civil\n\n Aviation Safety Regulations 1998:\n\n (a) revoke the Airworthiness Directives mentioned in\n\n Schedule 1; and\n\n (b) make, as separate instruments, each Airworthiness\n\n Directive mentioned in Schedule 1 and attached.\n\n \n\n ![](image.001.png)\n\n David Villiers\n\n Delegate of the Civil Aviation Safety Authority\n\n \n\n  20 December 2004\n\n Note:   Each attached Airworthiness Directive is being re-made in exactly the\n\n same form as appears in the latest published edition of the Directive.\n\n \n\n\n Schedule 1 Revocation and Remaking of\n\n Airworthiness Directives\n\n Hydraulic Equipment\n\n AD Name AD Number\n\n Sprague Engineering Hydraulic Accumulator - Modification AD/HYD/1\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a purely administrative remaking of an existing airworthiness directive. The note explicitly states the directive is being remade 'in exactly the same form' as the existing published edition. There is no expansion of scope, no new requirements, and no change to the original safety intent."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined term implicitly referenced (the AD number AD/HYD/1)","No conditional logic or nested exceptions","Single cross-reference to subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998","Straightforward administrative action: revoke and remake in identical form","No substantive technical content included (the actual AD content is attached but not reproduced in this instrument)"],"plain_english_summary":"This is an official aviation safety instrument from December 2004. **David Villiers**, acting as a delegate for the Civil Aviation Safety Authority (CASA), has used his powers under aviation regulations to **revoke and immediately remake** a specific airworthiness directive.\n\n**What it does:**\n- **Revokes** (cancels) an existing safety rule called Airworthiness Directive AD/HYD/1, which deals with modifications to **Sprague Engineering Hydraulic Accumulators** (pressure storage devices used in aircraft hydraulic systems).\n- **Remakes** that same directive as a fresh, standalone legal instrument.\n\n**Why remake it?**\nThe note at the bottom explains that the directive is being reissued in **exactly the same form** as it already existed. This is typically done for administrative reasons — such as consolidating multiple directives into separate instruments, fixing legislative drafting issues, or ensuring each directive has proper legal standing as an individual document rather than being bundled together.\n\n**Who it affects:**\n- Aircraft operators and maintenance organisations who use or maintain aircraft with Sprague Engineering hydraulic accumulators.\n- Licensed aircraft maintenance engineers responsible for ensuring these components meet safety standards.\n\n**Why it matters:**\nAirworthiness Directives are **legally binding safety orders**. They require specific actions (inspections, modifications, or replacements) to address unsafe conditions in aircraft. Even though this particular directive is being remade without changes, the formal process ensures the safety requirement remains enforceable and clearly documented."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument does not change the substantive scope or content of the Airworthiness Directive listed in Schedule 1. It revokes the old instrument and re‑makes the AD as a separate instrument in exactly the same form as the latest published edition (see main text; Note; Schedule 1). The effect is administrative re‑issuance rather than a change in obligations."},"complexity_factors":["Short, single-purpose instrument: revokes and re‑issues specified AD(s).","References one statutory power only (subregulation 39.001(1)).","No technical or operational requirements are set out in the text itself; substantive detail is contained in attached/reissued ADs.","Administrative effect only (Note states ADs are re‑made in identical form), so legal analysis depends on the attached AD text rather than this instrument.","Possible practical complexity from attachment/publication mechanics (how the re‑made ADs are accessed/referenced) although the instrument does not address transitional detail."],"plain_english_summary":"This instrument administratively revokes the listed Airworthiness Directive(s) and re‑issues each as separate legal instruments in the same form as their latest published editions. It affects owners/operators of aircraft fitted with the specified Sprague Engineering hydraulic accumulator by leaving existing compliance obligations and costs unchanged. The change is procedural, undertaken by a CASA delegate, chiefly to update legal form and publication."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-hydraulic-equipment","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-hydraulic-equipment/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-hydraulic-equipment/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-hydraulic-equipment/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-hydraulic-equipment/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-hydraulic-equipment/documents"}}