{"id":"F2006B08044","name":"Airworthiness Directives 2004 - Revocation and Remaking - Turbomeca Turbine Engines - Astazou Series","slug":"airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-astazou-series","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115122,"registerId":"commonwealth-F2006B08044-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 - Astazou 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 - Astazou Series\n\nAD Name AD Number\n\nEngine Components - Life Limitations - CANCELLED AD/ASTAZOU/1\n\nEngine Components - Life Limits - CANCELLED AD/ASTAZOU/2\n\nInspection of Axial Compressor Wheels AD/ASTAZOU/3","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument reissues the listed Airworthiness Directives in exactly the same form as their latest published editions (see Note). It therefore does not change the substantive scope of the AD requirements themselves; it changes only their legal form and how each AD is published as a separate instrument (see paragraphs (a) and (b) and Schedule 1)."},"complexity_factors":["Very short instrument with a single administrative function (revocation and re‑making).","Cross‑references to other documents: relies on the text of the separate ADs (latest published editions) which are not contained in this instrument (see Note and Schedule 1).","Delegated decision‑making reference to subregulation 39.001(1) requires looking up the empowering regulation for legal context.","Schedule 1 lists items labelled as \"CANCELLED\", introducing a small ambiguity that requires checking the attached ADs or publication history for clarity.","Potential administrative impact on stakeholders who must locate and refer to the re‑made separate instruments rather than the previous consolidated form."],"plain_english_summary":"### What this instrument does (mechanically)\n\n- A delegate of the Civil Aviation Safety Authority (CASA) exercises power under subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998 to revoke a set of existing Airworthiness Directives (ADs) and to re‑make each AD as a separate legal instrument (see subregulation reference and paragraphs (a) and (b)).\n- The revocation and re‑making apply to the ADs listed in Schedule 1, which concern Turbomeca Astazou series turbine engines. Two of the listed items are labelled \"CANCELLED\" and one concerns inspection of axial compressor wheels (see Schedule 1).\n- The instrument states that each attached AD is being re‑made in exactly the same form as appears in the latest published edition of the Directive (see Note).\n\n### Who this affects\n\n- Aircraft owners, operators, maintenance organisations and maintenance personnel who operate, maintain or certify aircraft powered by Turbomeca Astazou series engines. Those parties are the ones required to follow the technical requirements and limitations set out in the relevant ADs (see Schedule 1 and Note).  \n- The CASA delegate (the decision maker named in the instrument) is the Commonwealth official making the change (see signature and delegatory reference).\n\n### Why it matters (claimed purpose and practical effect)\n\n- The instrument claims to accomplish an administrative revocation and re‑issue: it revokes the listed ADs and remakes them as separate instruments, and it explicitly says the remade ADs are identical to the latest published editions (see (a), (b) and Note). That is a claim about form rather than substantive change.\n\n- Practical effects implied by the text:\n  - If the remade ADs are truly identical to the published versions, there is no change to operational or maintenance obligations arising from the AD content itself; obligations remain those set out in the AD texts (see Note).  \n  - The administrative action can change how the ADs are recorded or located in the legislative/instrument collection (they will exist as separate instruments rather than as part of the prior instrument). Operators and maintainers therefore may need to consult a different instrument identifier or filing location to find their obligations (see (b) and Schedule 1).\n\n### Who pays and what behaviour changes\n\n- Any compliance cost (work, parts, inspections, life‑limit replacements, paperwork) remains payable by the operators or owners required by the ADs. This instrument itself does not specify new technical obligations or new costs; it reissues existing ADs in the same form (see Note).  \n- Administrative costs fall on regulated parties who must locate and rely on the newly separate instruments instead of the prior consolidated format (see (b)). CASA bears administrative effort in revoking and re‑making the instruments.\n\n### Incentives, trade‑offs and implementation considerations\n\n- Incentives: The delegate exercises statutory power to restructure how ADs are published. This can make individual ADs easier to reference (benefit) but requires stakeholders to track potentially different instrument identifiers (cost). The text does not provide a rationale beyond the mechanical revocation/remaking statement (see (a), (b), Note).\n\n- Trade‑offs and risks: Because the instrument re‑makes ADs \"in exactly the same form\" (Note), the main risk is administrative confusion or transition costs if stakeholders are not informed about the new instrument identifiers or locations. There is no text indicating a substantive policy change to maintenance, life limits, or inspection requirements.\n\n- Bureaucratic discretion: The action is taken by a named CASA delegate under the cited regulation; the instrument records who decided and under what statutory power (see opening paragraph and subregulation citation). The scope for further discretion is not set out in this short instrument.\n\n### Where to look for the actual technical obligations\n\n- The ADs themselves contain the operational requirements (life limits, inspection tasks, etc.). This instrument points to those ADs being reissued unchanged (Note). To determine concrete technical obligations and costs, consult the separately published AD instrument texts listed in Schedule 1."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a pure re-enactment instrument. The scope remains identical to the original Airworthiness Directives — the note explicitly states each directive is being remade \"in exactly the same form as appears in the latest published edition.\" There is no expansion of regulatory scope or substantive amendment."},"complexity_factors":["Very short instrument (under 300 words)","Only 3 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: revoke (a) and remake (b)","No conditional logic or exceptions","Straightforward administrative action with no policy changes"],"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) three existing Airworthiness Directives (ADs) for Turbomeca Astazou series turbine engines — these are safety rules that aircraft owners must follow\n- **Remakes** those same three directives as separate, standalone legal instruments\n\n**Who it affects:**\n- Owners and operators of aircraft using Turbomeca Astazou turbine engines\n- Maintenance engineers and organisations working on these engines\n- The three specific directives cover:\n  - Life limits for engine components (two cancelled directives)\n  - Inspection requirements for axial compressor wheels\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety instructions. If you don't comply, you can't fly the aircraft. This instrument is essentially a housekeeping exercise — CASA is reorganising how these rules are structured legally, but **not changing the actual safety requirements**. The note at the bottom confirms each directive is being remade \"in exactly the same form\" as before.\n\nThis type of instrument is common when regulators need to reissue rules under new legal frameworks or correct technical deficiencies in how the original directives were made."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-astazou-series","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-astazou-series/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-astazou-series/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-astazou-series/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-astazou-series/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-astazou-series/documents"}}