{"id":"F2006B08054","name":"Airworthiness Directives 2004 - Revocation and Remaking - Warner Piston Engines","slug":"airworthiness-directives-2004-revocation-and-remaking-warner-piston-engines","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115138,"registerId":"commonwealth-F2006B08054-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 - Warner Piston Engines","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 Warner Piston Engines\n\n AD Name AD Number\n\n Cylinder Hold-Down Nut - Inspection AD/WNR/1\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a pure administrative remaking exercise. The scope remains identical to the original 2004 Airworthiness Directive — the instrument explicitly states it is re-made \"in exactly the same form.\" No expansion of regulatory reach or subject matter."},"complexity_factors":["Very short instrument (under 300 words)","Only 1 defined term implicitly referenced (the AD number AD/WNR/1)","Simple binary structure: (a) revoke, (b) remake","No cross-references to other legislation beyond the empowering regulation (subregulation 39.001(1))","No conditional logic or exceptions","Single substantive item in Schedule (one Airworthiness Directive)","Procedural/administrative nature — substantive technical content is in the attached (but not reproduced) directive"],"plain_english_summary":"This is a technical aviation safety instrument that **revokes and immediately remakes** two existing safety rules about Warner piston aircraft engines.\n\n**What it does:**\n- **Revokes** (cancels) an old Airworthiness Directive called AD/WNR/1 about inspecting cylinder hold-down nuts on Warner piston engines\n- **Remakes** that same directive as a new, separate legal instrument in exactly the same form as before\n\n**Who it affects:**\n- Owners and operators of aircraft with **Warner piston engines**\n- Aircraft maintenance engineers who work on these engines\n- The Civil Aviation Safety Authority (CASA) itself\n\n**Why it matters:**\nAirworthiness Directives are **legally binding safety orders** issued when a design flaw, maintenance issue, or wear pattern could make an aircraft unsafe. This \"revoke and remake\" process is a housekeeping exercise — it updates the legal status of the directive without changing its actual safety requirements. The cylinder hold-down nut inspection rule remains in force; only its legal \"wrapping\" changes.\n\n**Key point:** The Note explicitly states each directive is being re-made \"in exactly the same form\" — so no new safety requirements are introduced here."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument does not change the substantive scope of the affected Airworthiness Directive(s). It revokes the listed AD(s) and re-issues each as a separate instrument in the same form as the latest published edition, preserving the existing technical requirements and obligations (main text; note; Schedule 1)."},"complexity_factors":["Narrow regulatory action limited to revocation and reissuance of listed AD(s) (main text; Schedule 1).","No substantive change to technical requirements — instrument states re-made ADs are identical to latest published edition (note).","Action taken under a single delegated power (subregulation 39.001(1)), limiting legal pathway complexity.","References to external 'latest published edition' create dependency on off-instrument publications for substantive detail.","Administrative and transitional issues (version control, notifying affected parties) present operational complexity despite legal simplicity."],"plain_english_summary":"This instrument authorises a CASA delegate to revoke listed Airworthiness Directive(s) and re‑issue each as a separate, standalone AD identical to its latest published form. It affects aircraft owners, operators and maintenance personnel responsible for Warner piston‑engine aircraft subject to AD/WNR/1. \n\nIn practice it is an administrative re‑issue: the same inspection requirement for the cylinder hold‑down nut continues to apply, with no change to technical content or compliance obligations."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-warner-piston-engines","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-warner-piston-engines/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-warner-piston-engines/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-warner-piston-engines/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-warner-piston-engines/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-warner-piston-engines/documents"}}