{"id":"F2006B07559","name":"AD/VAT/26 - Wing Walkway - Modification","slug":"ad-vat-26-wing-walkway-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50153,"registerId":"commonwealth-F2006B07559-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/VAT/26 - Wing Walkway - 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/26 Wing Walkway - Modification 11/66\n\nApplicability: Victa Airtourer 100 and 115. Document: Victa SB No. 64.\n\nCompliance: Within 150 hours time in service after 7 November 1966.\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\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The supplied text sets a single, specific requirement (modify the wing walkway on Victa Airtourer 100 and 115 per Victa SB No. 64 within 150 hours TIS after 7 November 1966). The document contains no information indicating that the directive's scope has been changed from an earlier or different requirement. Based on the text provided, the directive's scope is narrowly confined to the identified models and the stated compliance window. (Applicability; Document; Compliance)"},"complexity_factors":["Narrow applicability (only Victa Airtourer 100 and 115) — reduces scope complexity. (Applicability)","Mandatory compliance with a fixed time-in-service deadline (150 hours after a specified date) — creates scheduling but is straightforward. (Compliance)","Technical detail is not included in the directive; compliance depends on an external document (Victa SB No. 64), requiring cross-reference and access to the service bulletin. (Document)","No exemptions, alternatives, or enforcement procedures are set out in the supplied text — simplicity in form but reliance on regulator's broader framework for enforcement. (header; Compliance)","Historical/effective date (7 November 1966) makes the instrument time-specific but does not add legal complexity to the requirement itself. (Compliance)"],"plain_english_summary":"AD/VAT/26 mandates that owners/operators of Victa Airtourer 100 and 115 aircraft have the wing walkway modified in accordance with Victa Service Bulletin No. 64. The work must be completed within 150 hours time in service after 7 November 1966, creating a mandatory compliance window and associated maintenance scheduling and cost obligations."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1966 addressing a specific technical modification. It has not expanded beyond its original narrow scope of requiring a wing walkway modification on two specific aircraft models."},"complexity_factors":["Extremely short document (under 100 words of substantive content)","Only 2 defined applicability criteria (aircraft models)","Single compliance requirement with clear deadline","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","No conditional logic, exceptions, or nested provisions","Refers to external technical document (Service Bulletin No. 64) for actual modification details rather than embedding them"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — essentially a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it requires:** Owners and operators of **Victa Airtourer 100 and 115** aeroplanes must modify the **wing walkway** (the reinforced area on the wing where pilots and mechanics step when entering/exiting the aircraft or performing maintenance). The modification must follow the instructions in **Victa Service Bulletin No. 64**.\n\n**When it must be done:** Within **150 hours of flight time** after **7 November 1966**.\n\n**Why it matters:** Wing walkways take a lot of wear and tear from foot traffic. This directive addresses a specific structural or safety concern with these particular aircraft models — likely to prevent damage that could compromise wing integrity or create a slipping hazard. Non-compliance means the aircraft cannot legally fly.\n\n**Who it affects:** Anyone who owns, operates, or maintains a Victa Airtourer 100 or 115 aircraft in Australia."}},"importantCases":[],"_links":{"self":"/api/acts/ad-vat-26-wing-walkway-modification","history":"/api/acts/ad-vat-26-wing-walkway-modification/history","analysis":"/api/acts/ad-vat-26-wing-walkway-modification/analysis","conflicts":"/api/acts/ad-vat-26-wing-walkway-modification/conflicts","importantCases":"/api/acts/ad-vat-26-wing-walkway-modification/important-cases","documents":"/api/acts/ad-vat-26-wing-walkway-modification/documents"}}