{"id":"F2006B07974","name":"Airworthiness Directives 2004 - Revocation and Remaking - Pratt and Whitney Canada Turbine Engines - PW500 Series","slug":"airworthiness-directives-2004-revocation-and-remaking-pratt-and-whitney-canada-turbine-engines-pw500","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115022,"registerId":"commonwealth-F2006B07974-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 - Pratt and Whitney Canada Turbine Engines - PW500 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 Pratt and Whitney Canada Turbine Engines - PW500 Series\n\n AD Name AD Number\n\n Flexible Fuel Tubes AD/PW500/1\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument maintains the exact same scope as the original 2004 project intent. It is purely administrative — revoking and remaking an existing Airworthiness Directive in identical form. There is no expansion of regulatory scope or substantive change to the safety requirements being imposed."},"complexity_factors":["Very short document (under 500 words)","Only one defined term implicitly referenced (the AD number AD/PW500/1)","Simple binary structure: revoke (a) and remake (b)","No nested conditional logic or exceptions","Single cross-reference to Civil Aviation Safety Regulations 1998 (subregulation 39.001(1)) — the enabling power","No substantive technical content included (the actual AD content is attached but not reproduced in this instrument)","Essentially an administrative machinery instrument for legislative housekeeping"],"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) an existing Airworthiness Directive (AD/PW500/1) concerning \"Flexible Fuel Tubes\" for Pratt & Whitney Canada PW500 series turbine engines\n- **Remakes** that same directive as a separate, standalone legal instrument\n\n**Who it affects:**\n- Owners and operators of aircraft using Pratt & Whitney Canada PW500 series turbine engines\n- Maintenance organisations servicing these engines\n- CASA itself (as the regulator)\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety orders. When CASA identifies a safety issue with an aircraft or engine, they issue an AD requiring specific inspections, repairs, or modifications. This instrument is part of a broader 2004 project to clean up how ADs were structured — converting them from being embedded in larger revocation/remaking instruments into separate, individual instruments. This makes them easier to find, reference, and comply with.\n\nThe \"Flexible Fuel Tubes\" directive likely addressed a specific mechanical defect or wear issue in the fuel system of these engines that could affect flight safety if not addressed."},"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 expressly revokes the listed AD(s) and re-issues them in exactly the same form as the latest published edition (see Schedule 1 and the Note). The practical obligations on operators and maintainers therefore remain the same; the change is to the legal form and publication of the AD(s), not to their operational content."},"complexity_factors":["Procedural instrument limited to revocation and re-making of listed AD(s) (opening paragraph).","Single regulatory authority cited: subregulation 39.001(1) (opening paragraph).","Only one AD listed in Schedule 1 (AD/PW500/1 - Flexible Fuel Tubes), limiting substantive scope (Schedule 1).","No substantive change to the content of the AD(s) — re-made in identical form (Note).","No technical amendments or additional compliance mechanisms included in the instrument."],"plain_english_summary":"This instrument revokes the Airworthiness Directive(s) listed in Schedule 1 and re‑issues each as separate, freshly made instruments identical to their latest published editions. It affects operators, maintenance organisations and certifying staff for Pratt & Whitney Canada PW500‑series engines (AD/PW500/1 — Flexible Fuel Tubes) and CASA as the delegating body.\n\nPractically, it creates updated legal instruments without changing substantive safety obligations or imposing new compliance costs beyond those already in the AD(s)."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pratt-and-whitney-canada-turbine-engines-pw500","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pratt-and-whitney-canada-turbine-engines-pw500/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pratt-and-whitney-canada-turbine-engines-pw500/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pratt-and-whitney-canada-turbine-engines-pw500/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pratt-and-whitney-canada-turbine-engines-pw500/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pratt-and-whitney-canada-turbine-engines-pw500/documents"}}