{"id":"F2006B07558","name":"AD/VAT/25 - Nose Wheel Steering - Inspection","slug":"ad-vat-25-nose-wheel-steering-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50152,"registerId":"commonwealth-F2006B07558-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/VAT/25 - Nose Wheel Steering - Inspection","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/25  Nose Wheel Steering - Inspection 11/65 Applicability:  Victa Airtourer 100 and 115 prior to S/Nos. 108 not incorporating Mod. No. B209. Document:              Victa SB No. 49, Issue 2.\n\nCompliance:   At intervals not exceeding 100 hours time in service.\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 instrument, as presented, sets a targeted inspection requirement for a defined subset of Victa Airtourer 100 and 115 aeroplanes and excludes aircraft with Modification No. B209. There is no indication in the supplied text that the scope has been expanded or narrowed from an earlier or original version; the AD text plainly states applicability and a single compliance interval (100 hours) referencing Victa SB No. 49, Issue 2."},"complexity_factors":["Narrow applicability defined by aircraft model, serial number cut-off and presence/absence of a specific modification (Mod. No. B209) (Applicability).","Fixed, short compliance interval tied to flight hours (every 100 hours) creates a recurring scheduling and cost obligation (Compliance).","Technical inspection details are outsourced to an external Service Bulletin (Victa SB No. 49, Issue 2), requiring operators to obtain and follow that separate document (Document).","AD text is short and prescriptive; little internal procedural detail reduces legal-text complexity but shifts technical complexity to the referenced service bulletin.","Age and vintage of the AD (date noted as 11/65) may create practical complexity in locating parts, records, or the referenced SB, though the AD itself remains simple."],"plain_english_summary":"This AD mandates recurring inspections of the nose wheel steering on Victa (A.E.S.L.) Airtourer 100 and 115 aircraft built before serial number 108 (unless Mod. No. B209 is fitted). Inspections must be done at intervals not exceeding 100 hours TIS, following Victa Service Bulletin No. 49, Issue 2; owners/operators are responsible for arranging and funding inspections and any required corrective work."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted airworthiness directive focused on a specific mechanical issue in a specific aircraft type. It has not expanded beyond its original purpose of ensuring nose wheel steering integrity in early Victa Airtourer aircraft."},"complexity_factors":["Single, specific applicability clause limiting to particular aircraft serial numbers and modification status","Only one compliance requirement (recurring 100-hour inspection)","No defined terms section — relies on external reference to Victa Service Bulletin No. 49","No cross-references to other legislation or regulations within the text","Extremely short document (approximately 100 words of substantive content)","Single condition (prior to S/Nos. 108 not incorporating Mod. No. B209) with clear logical structure"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety instruction issued by the Civil Aviation Safety Authority (CASA) for aircraft owners and operators.\n\n**What it does:**\n- Requires owners of specific **Victa Airtourer 100 and 115 aeroplanes** (early serial numbers before #108 that haven't been modified with Mod. No. B209) to **inspect their nose wheel steering system**.\n- The inspection must be done **every 100 hours of flight time** (\"time in service\").\n\n**Who it affects:**\n- Owners and operators of early-model Victa Airtourer aircraft built before serial number 108, unless they've already had a specific modification (B209) installed.\n\n**Why it matters:**\n- Nose wheel steering failures can cause loss of directional control during taxi, takeoff, or landing — potentially leading to runway excursions or accidents. This directive ensures potential defects are caught before they cause problems.\n\n**Key details:**\n- **Compliance deadline:** Every 100 hours of operation (ongoing requirement, not a one-off).\n- **Technical reference:** Victa Service Bulletin No. 49, Issue 2 (this document contains the actual inspection instructions).\n- **Original issue date:** November 1965 (this is an older directive still in force)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-vat-25-nose-wheel-steering-inspection","history":"/api/acts/ad-vat-25-nose-wheel-steering-inspection/history","analysis":"/api/acts/ad-vat-25-nose-wheel-steering-inspection/analysis","conflicts":"/api/acts/ad-vat-25-nose-wheel-steering-inspection/conflicts","importantCases":"/api/acts/ad-vat-25-nose-wheel-steering-inspection/important-cases","documents":"/api/acts/ad-vat-25-nose-wheel-steering-inspection/documents"}}