{"id":"F2006B08042","name":"Airworthiness Directives 2004 - Revocation and Remaking - Turbomeca Turbine Engines - Arrius Series","slug":"airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-arrius-series","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115118,"registerId":"commonwealth-F2006B08042-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 - Turbomeca Turbine Engines - Arrius Series","content":"Airworthiness Directives 2004\n\nI, DAVID ALAN VILLIERS, delegate of the Civil Aviation Safety\n\nAuthority, acting under subregulation 39.001 (1) of the Civil\n\nAviation Safety Regulations 1998:\n\n(a) revoke the Airworthiness Directives mentioned in\n\nSchedule 1; and\n\n(b) make, as separate instruments, each Airworthiness\n\nDirective mentioned in Schedule 1 and attached.\n\n![](image.001.png)\n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority\n\n20 December 2004\n\nNote: Each attached Airworthiness Directive is being re-made in exactly the\n\nsame form as appears in the latest published edition of the Directive.\n\n  \nSchedule 1 Revocation and Remaking of\n\nAirworthiness Directives\n\nTurbomeca Turbine Engines - Arrius Series\n\nAD Name AD Number\n\nFuel Injection Manifold Replacement AD/ARRIUS/1 Amdt 1\n\nFuel Injection Manifold Replacement AD/ARRIUS/2 Amdt 1\n\nFuel Control Unit AD/ARRIUS/3\n\nFuel Injection AD/ARRIUS/4\n\nTurboshaft Engine Unairworthy AD/ARRIUS/5\n\nEngine Electronic Control Unit Software AD/ARRIUS/6 Amdt 1","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The document explicitly states that each directive is being re-made 'in exactly the same form as appears in the latest published edition.' This is purely an administrative reissuance with no expansion of scope, new requirements, or policy changes."},"complexity_factors":["Very short document (under 500 words)","Only 1 defined term implicitly used ('Airworthiness Directive' — understood from context)","Simple binary structure: revoke old, make new","No conditional logic or exceptions","No cross-references to other legislation beyond the enabling regulation (subregulation 39.001(1))","Tabular schedule with only 2 columns and 6 rows","Explicit statement that content is unchanged ('re-made in exactly the same form')"],"plain_english_summary":"This document is an official order from the Civil Aviation Safety Authority (CASA) that **revokes and reissues six specific safety rules** for a particular type of aircraft engine.\n\n**What it does:**\n- **Revokes** (cancels) six existing Airworthiness Directives for Turbomeca Arrius series turbine engines\n- **Re-makes** those same six directives as new, separate legal instruments\n- Keeps the content of each directive **exactly the same** as before — no technical changes are being made\n\n**Who it affects:**\n- Owners and operators of aircraft using Turbomeca Arrius series engines (commonly used in helicopters)\n- Aircraft maintenance engineers and organisations\n- CASA itself (as the regulator)\n\n**Why it matters:**\nAirworthiness Directives are **legally binding safety orders** that require specific inspections, repairs, or modifications to aircraft components. This exercise is purely **administrative housekeeping** — CASA is updating the legal \"packaging\" of these rules without changing their substance. This might be done to improve how the directives are organised in the official register, to fix technical legal issues with how they were originally made, or to align with changes in CASA's internal procedures.\n\n**The six directives cover:**\n- Fuel injection manifold replacement (two separate directives)\n- Fuel control unit issues\n- Fuel injection systems\n- Declaring engines unairworthy under certain conditions\n- Engine electronic control unit software updates"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument expressly states that each attached Airworthiness Directive is being re-made \"in exactly the same form as appears in the latest published edition of the Directive,\" indicating no change to the substantive scope or requirements of those ADs. (See the Note and Schedule 1.)"},"complexity_factors":["Instrument is procedural (revocation and re-making) rather than substantive change to technical AD requirements","Multiple ADs listed in Schedule 1 (six separate directives), requiring cross-checking by affected parties","Reference to external regulatory authority (subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998) introduces a statutory linkage","Attachments and latest published editions are referenced but not reproduced in the instrument, requiring users to consult external documents","Potential for transitional confusion over which instrument identifier is the operative legal document"],"plain_english_summary":"This instrument revokes several Airworthiness Directives for Turbomeca Arrius turbine engines and re‑issues each as a separate instrument, identical to the latest published editions. It does not change substantive compliance requirements; instead it affects owners, operators, maintainers and certificated organisations who must now reference the re‑made instruments. Practical impact is mainly administrative—updating records and confirming which instrument identifier is current—rather than any new technical obligations."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-arrius-series","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-arrius-series/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-arrius-series/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-arrius-series/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-arrius-series/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-arrius-series/documents"}}