{"id":"F2006B07546","name":"AD/VAT/14 - Fuel Tank Vent System - Installation of Scoop","slug":"ad-vat-14-fuel-tank-vent-system-installation-of-scoop","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50140,"registerId":"commonwealth-F2006B07546-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/VAT/14 - Fuel Tank Vent System - Installation of Scoop","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/14 Fuel Tank Vent System - Installation of Scoop 4/64\n\nApplicability: Victa Airtourer 100 and 115. Document:  1. Victa SB No. 28; or\n\n2. Victa Mod. B104. Compliance: 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","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive's scope in the supplied text is a single, targeted technical requirement limited to Victa Airtourer 100 and 115 aircraft: install a scoop on the fuel tank vent system according to Victa SB No. 28 or Victa Mod. B104, to be completed before 1 September 1971. The excerpt does not indicate any change from that original scope or any expansion/narrowing beyond those stated applicability and method references (\"Applicability\", \"Document\", \"Compliance\")."},"complexity_factors":["Very narrow applicability (only Victa Airtourer 100 and 115) (\"Applicability\")","Single, clearly stated technical requirement (install a scoop on the fuel tank vent system) (AD title and subject)","Mandatory fixed compliance deadline (before 1 September 1971) (\"Compliance\")","Technical details are not contained in the AD text and require consulting external documents (Victa SB No. 28 or Victa Mod. B104) (\"Document\")","Practical complexity arises from mechanical work, parts procurement and scheduling maintenance (implied by requirement and referenced documents)"],"plain_english_summary":"This directive mandates fitting a scoop to the fuel‑tank vent on Victa Airtourer 100 and 115 aeroplanes, installed per Victa Service Bulletin No. 28 or Victa Modification B104, completed by 1 September 1971. \n\nOwners/operators must obtain the referenced documents, arrange and fund the work, and schedule any downtime — a one‑time compliance cost to meet the mandatory safety requirement."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused specifically on fuel tank vent modifications for two specific aircraft models. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (under 150 words)","Only 2 defined applicability criteria (aircraft models)","Simple binary compliance pathway (two acceptable documents)","Single absolute deadline with no conditional extensions","No cross-references to other legislation or regulations beyond the enabling Civil Aviation Regulations 1998","No nested exceptions or conditional logic"],"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 requires:** Owners and operators of specific Victa Airtourer aircraft (models 100 and 115) must install a **scoop on the fuel tank vent system**. This is a physical modification to prevent fuel system problems.\n\n**Who must comply:** Anyone operating or maintaining a Victa Airtourer 100 or 115 aircraft.\n\n**How to comply:** Follow either:\n- **Victa Service Bulletin No. 28**, or  \n- **Victa Modification B104**\n\n**Deadline:** The modification had to be completed **before 1 September 1971**.\n\n**Why it matters:** Fuel tank vent systems prevent dangerous pressure build-ups or vacuum conditions that could cause engine fuel starvation or fuel leaks. The scoop installation ensures proper venting during flight, reducing the risk of engine failure or fire."}},"importantCases":[],"_links":{"self":"/api/acts/ad-vat-14-fuel-tank-vent-system-installation-of-scoop","history":"/api/acts/ad-vat-14-fuel-tank-vent-system-installation-of-scoop/history","analysis":"/api/acts/ad-vat-14-fuel-tank-vent-system-installation-of-scoop/analysis","conflicts":"/api/acts/ad-vat-14-fuel-tank-vent-system-installation-of-scoop/conflicts","importantCases":"/api/acts/ad-vat-14-fuel-tank-vent-system-installation-of-scoop/important-cases","documents":"/api/acts/ad-vat-14-fuel-tank-vent-system-installation-of-scoop/documents"}}