{"id":"F2006B07542","name":"AD/VAT/1 - Nose Wheel Leg Attachment Angles - Replacement","slug":"ad-vat-1-nose-wheel-leg-attachment-angles-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50121,"registerId":"commonwealth-F2006B07542-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/VAT/1 - Nose Wheel Leg Attachment Angles - Replacement","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/1 Nose Wheel Leg Attachment Angles - Replacement\n\nApplicability: Victa Airtourer 100 with S/Nos. 1 to 8. Document:  Victa SB No. 3.\n\nCompliance: Before 1 September 1971.\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\n12/62\n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument, as presented, sets a narrowly targeted, time‑limited mandatory requirement for replacement of a specified component on a defined set of aircraft. The source text contains no language indicating an expansion or narrowing of that scope relative to the directive itself; therefore no scope change from the directive as written is indicated."},"complexity_factors":["Narrow applicability: specifies a single model and a small range of serial numbers (Victa Airtourer 100, S/Ns 1–8). (Applicability)","Single, time‑bound action: one mandatory activity (replacement) with a fixed deadline. (Compliance)","Reference to an external technical document (Victa SB No. 3) which contains the detailed procedure; understanding/performing the work requires that technical bulletin. (Document)","No alternative compliance paths, exemptions or phased approach stated in the text, reducing decision complexity but increasing operational pressure. (Compliance)","Historical/fixed compliance date (before 1 September 1971) — the dated deadline imposes urgency but simplifies the requirement. (Compliance)","Regulatory enforcement implied rather than detailed — practical enforcement mechanisms and penalties are not specified in the text. (Header; Compliance)"],"plain_english_summary":"### What this instrument does, mechanically\nThis Airworthiness Directive (AD/VAT/1) requires that the nose wheel leg attachment angles on Victa Airtourer 100 aeroplanes with serial numbers 1 to 8 be replaced. The replacement is to be carried out in accordance with Victa Service Bulletin No. 3. The work must be completed before 1 September 1971. (Source: AD/VAT/1 — Applicability; Document; Compliance.)\n\n### Who it affects\n- Owners and operators of Victa Airtourer 100 aeroplanes with S/Ns 1–8. (Applicability)\n- Maintenance organisations and licensed engineers who perform the replacement in line with Victa SB No. 3. (Document)\n\n### How it works in practice\n- The regulator (Civil Aviation Safety Authority, via the Schedule of Airworthiness Directives) issues the mandatory requirement. (Header: Civil Aviation Safety Authority; Schedule of Airworthiness Directives.)\n- Affected aircraft must have the specified parts replaced before the stated deadline. Proof of compliance will be required to show the aircraft remains airworthy. (Compliance)\n\n### Who pays and who decides\n- The direct cost of parts, labour and any downtime is borne by the aircraft owners/operators. (Applicability; Document; Compliance.)\n- The Civil Aviation Safety Authority sets the requirement and enforces compliance through the Airworthiness Directives process. (Header: Civil Aviation Safety Authority; Schedule of Airworthiness Directives.)\n\n### Incentives, trade-offs and compliance implications\n- Incentives: Owners must act to restore compliance and continue legal operation of the aeroplane; maintenance businesses are engaged to perform the replacement. (Applicability; Document; Compliance.)\n- Costs and trade-offs: The instrument creates an immediate replacement cost and potential aircraft downtime for a small, well‑defined group (S/Ns 1–8). The deadline concentrates pressure on owners to procure parts and labour before the compliance date. (Applicability; Compliance.)\n- Implementation risk and practical constraints: The AD depends on availability of the replacement parts and the ability of maintenance providers to carry out the work to the service bulletin’s specification. The text itself does not describe alternate compliance routes or extension procedures. (Document; Compliance.)\n\n### Bureaucratic discretion and enforcement\n- The directive is prescriptive and time‑bound; the text sets no discretionary exemptions or alternative compliance methods. Enforcement rests with the aviation regulator. (Header; Compliance.)\n\n### Net effect on private choice and markets\n- The requirement compels a small set of aircraft owners to purchase parts and services they would not otherwise need if the AD were absent. This creates a concentrated compliance cost for those owners and demand for relevant maintenance work. (Applicability; Document; Compliance.)"},"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue safety directive with no evidence of scope creep. It addresses one specific mechanical defect on one specific aircraft model series. The document appears complete and unaltered from its original purpose."},"complexity_factors":["Extremely short document (under 100 words of substantive content)","No defined terms section","No cross-references to other legislation (only references manufacturer service bulletin)","Simple unconditional mandate: replace part X by date Y","No exceptions, exemptions, or conditional logic","Narrow applicability (only 8 specific aircraft serial numbers)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's aviation safety regulator (CASA). It requires owners of specific **Victa Airtourer 100 aircraft** (serial numbers 1 through 8) to **replace the nose wheel leg attachment angles** before 1 September 1971.\n\n**What it does:**\n- Mandates a specific mechanical repair/replacement on a small subset of light aircraft\n- References a manufacturer's service bulletin (Victa SB No. 3) for technical details\n\n**Who it affects:**\n- Owners/operators of eight specific Victa Airtourer 100 planes (S/Nos. 1–8)\n- These were Australian-designed light aircraft from the 1960s\n\n**Why it matters:**\n- Nose wheel attachment failures can cause landing gear collapse — a serious safety risk\n- The directive makes compliance legally mandatory rather than just recommended\n- The deadline (1971) indicates this is a **historical directive** now only relevant for archival or restoration purposes"}},"importantCases":[],"_links":{"self":"/api/acts/ad-vat-1-nose-wheel-leg-attachment-angles-replacement","history":"/api/acts/ad-vat-1-nose-wheel-leg-attachment-angles-replacement/history","analysis":"/api/acts/ad-vat-1-nose-wheel-leg-attachment-angles-replacement/analysis","conflicts":"/api/acts/ad-vat-1-nose-wheel-leg-attachment-angles-replacement/conflicts","importantCases":"/api/acts/ad-vat-1-nose-wheel-leg-attachment-angles-replacement/important-cases","documents":"/api/acts/ad-vat-1-nose-wheel-leg-attachment-angles-replacement/documents"}}