{"id":"F2006B08053","name":"Airworthiness Directives 2004 - Revocation and Remaking - Walter Turbine Engines - M601 Series","slug":"airworthiness-directives-2004-revocation-and-remaking-walter-turbine-engines-m601-series","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115136,"registerId":"commonwealth-F2006B08053-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"Airworthiness Directives 2004 - Revocation and Remaking - Walter Turbine Engines - M601 Series","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 Walter Turbine Engines - M601 Series\n\n AD Name AD Number\n\n Fuel Control Unit AD/M601/1\n\n Combustion Chamber Inner Liner AD/M601/2\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 existing instruments. The note explicitly states each directive is being remade 'in exactly the same form' — there is no expansion of scope, no new safety requirements, and no change to the original intent of the underlying Airworthiness Directives."},"complexity_factors":["Very short document (under 300 words)","Only 2 substantive items in Schedule 1","No defined terms section","No cross-references to other legislation beyond the enabling regulation (subregulation 39.001(1))","Simple binary structure: (a) revoke, (b) make","Straightforward administrative action with no conditional logic or exceptions"],"plain_english_summary":"This is a technical aviation safety instrument issued by the Civil Aviation Safety Authority (CASA) in December 2004. It does two things:\n\n**What it does:**\n- **Revokes** (cancels) two existing Airworthiness Directives (ADs) for Walter M601 series turbine engines — specifically AD/M601/1 (about Fuel Control Units) and AD/M601/2 (about Combustion Chamber Inner Liners)\n- **Remakes** these same directives as brand new, separate legal instruments\n\n**Who it affects:**\n- Owners and operators of aircraft using Walter M601 series turbine engines\n- Maintenance organisations working on these engines\n- Anyone responsible for ensuring these engines meet safety standards\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety orders. They require specific inspections, repairs, or modifications to aircraft components to prevent accidents. This instrument is essentially a housekeeping exercise — updating the legal form of existing safety requirements without changing their actual content. The note at the bottom confirms each directive is being remade \"in exactly the same form\" as before, meaning the safety requirements themselves haven't changed.\n\nThis kind of revocation and remaking is common in aviation law when regulators need to reissue instruments under new legal authorities, fix technical drafting issues, or consolidate regulatory frameworks."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"Scope has not changed. The instrument revokes the listed ADs and re‑makes them in the same form as the latest published editions (Note). The source text therefore indicates no substantive change to the content or obligations of AD/M601/1 and AD/M601/2; the action is administrative re‑issuance under subregulation 39.001(1)."},"complexity_factors":["Administrative nature: instrument revokes and re‑issues existing ADs without substantive change (Note).","Clear legal authority is cited (subregulation 39.001(1)), reducing interpretive ambiguity.","Limited scope: only two named ADs for a single engine series (Schedule 1).","No new technical requirements, procedures, or transitional rules included in the text.","Potential minor administrative complexity for stakeholders updating records and references to the re‑made instruments."],"plain_english_summary":"This instrument revokes two Airworthiness Directives for Walter M601 turbine engines (AD/M601/1 Fuel Control Unit and AD/M601/2 Combustion Chamber Inner Liner) and re‑issues each as separate attached instruments. It affects aircraft owners, operators and maintenance organisations; obligations continue unchanged in substance, so the action is an administrative re‑issuance requiring updates to records and compliance references."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-walter-turbine-engines-m601-series","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-walter-turbine-engines-m601-series/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-walter-turbine-engines-m601-series/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-walter-turbine-engines-m601-series/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-walter-turbine-engines-m601-series/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-walter-turbine-engines-m601-series/documents"}}