{"id":"F2006B07573","name":"AD/VAT/39 - Canopy Third Rail - Inspection and Modification","slug":"ad-vat-39-canopy-third-rail-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50180,"registerId":"commonwealth-F2006B07573-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/VAT/39 - Canopy Third Rail - Inspection and Modification","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Victa and A.E.S.L. Airtourer Series Aeroplanes\n\n \n\nAD/VAT/39 Canopy Third Rail - Inspection and Modification 6/75\n\nApplicability: All models.\n\n \n\nDocument:  Aerospace Airtourer SB No. 034. Compliance: Before 1 August 1975.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a historical Airworthiness Directive from 1975 (as indicated by '6/75' in the reference number). It appears complete and unchanged from its original purpose — a targeted safety directive for a specific aircraft type regarding a specific mechanical issue. The scope remains narrow and technical as originally intended."},"complexity_factors":["Extremely short document (approximately 150 words)","No defined terms section — uses plain language and references external technical document","No conditional logic or nested exceptions","Single, clear compliance requirement with specific deadline","Cross-reference to only one external document (Service Bulletin No. 034)","No subsections, parts, or structural complexity"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners and operators of **Victa and A.E.S.L. Airtourer series aeroplanes** to inspect and modify the **\"canopy third rail\"** — a structural component of the aircraft's cockpit canopy (the transparent cover over the pilot's seat). The specific work required is detailed in **Aerospace Airtourer Service Bulletin No. 034**.\n\n**Who it affects:** Anyone who owns, operates, or maintains any model of Victa or A.E.S.L. Airtourer aircraft.\n\n**Why it matters:** Airworthiness Directives are legally binding safety instructions. If you don't comply by the deadline (**before 1 August 1975**), your aircraft is not considered airworthy and cannot legally fly. This particular AD addresses a specific structural issue with the canopy rail that could affect flight safety.\n\n**Key details:**\n- **Applies to:** All models of Victa and A.E.S.L. Airtourer aeroplanes\n- **Action required:** Inspection and modification per Service Bulletin 034\n- **Deadline:** Before 1 August 1975\n- **Legal basis:** Civil Aviation Regulations 1998, Part 39"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD as presented sets a single remedy (inspection and modification) for a specified component, applies to all Airtourer models, references a single service bulletin for technical detail, and fixes a compliance date. Nothing in this excerpt indicates a change from an earlier or different scope; it reads as a straightforward issuance of a corrective requirement limited to the canopy third rail. (See Applicability; Document; Compliance.)"},"complexity_factors":["Single, narrowly framed requirement (inspection and modification of one component). (Title/subject).","Clear scope language: \"Applicability: All models\" reduces ambiguity on which aircraft are covered. (Applicability).","Technical steps are referenced to an external document (Aerospace Airtourer SB No. 034) rather than included in the AD, requiring access to and reliance on that SB for implementation. (Document).","Fixed compliance date (Before 1 August 1975) simplifies scheduling but may create ambiguity for aircraft acquired after that date or for retrospective record-keeping. (Compliance).","Minimal procedural, enforcement, or penalty detail in the text increases dependence on broader Part 39/authority procedures and supporting materials. (Header)."],"plain_english_summary":"This AD requires owners/operators of Victa / A.E.S.L. Airtourer series aeroplanes to inspect and, if necessary, modify the canopy third rail in accordance with Aerospace Airtourer Service Bulletin No. 034, with work completed by 1 August 1975. Issued under Part 39 by the civil aviation authority, compliance is mandatory and affects operators, maintenance organisations and the aircraft’s legal airworthiness."}},"importantCases":[],"_links":{"self":"/api/acts/ad-vat-39-canopy-third-rail-inspection-and-modification","history":"/api/acts/ad-vat-39-canopy-third-rail-inspection-and-modification/history","analysis":"/api/acts/ad-vat-39-canopy-third-rail-inspection-and-modification/analysis","conflicts":"/api/acts/ad-vat-39-canopy-third-rail-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-vat-39-canopy-third-rail-inspection-and-modification/important-cases","documents":"/api/acts/ad-vat-39-canopy-third-rail-inspection-and-modification/documents"}}