{"id":"F2006B07553","name":"AD/VAT/20 - Centre Flap Spar - Inspection","slug":"ad-vat-20-centre-flap-spar-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50147,"registerId":"commonwealth-F2006B07553-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/VAT/20 - Centre Flap Spar - 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/20 Centre Flap Spar - Inspection 6/64\n\nApplicability: Victa Airtourer 100 and 115 not incorporating Victa Mod. B141 and which have exceeded 500 hours time in service.\n\n \n\nRequirement: Inspect the centre flap spar in the region of the actuating bracket P/N 16105/1 for cracking. If cracking is found repair in accordance with an approved scheme before further flight.\n\n \n\nCompliance: At intervals not exceeding 100 hours time in service, after 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","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused on a specific structural inspection for a specific aircraft type. It has not expanded beyond its original purpose of ensuring the safety of the centre flap spar on Victa Airtourer aircraft."},"complexity_factors":["Very short document (approximately 150 words)","Only 4 defined elements: applicability criteria (2 conditions), specific part number, and compliance interval","Single, unambiguous requirement with one conditional trigger (cracking found = repair before flight)","No cross-references to other legislation or regulations","No nested exceptions or conditional logic beyond the applicability criteria","Straightforward temporal trigger (1 September 1971) and recurring interval (100 hours)"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific **Victa Airtourer aircraft** to inspect a critical structural part called the **centre flap spar** for cracks.\n\n**Who it affects:**\n- Owners and operators of **Victa Airtourer 100 and 115 model aircraft**\n- Only applies to planes that **haven't been modified** with Victa Modification B141\n- Only applies to planes that have **flown more than 500 hours**\n\n**What it requires:**\n- Inspect the metal spar (a structural beam) near the actuating bracket (part number 16105/1) for **cracking**\n- If cracks are found, the aircraft **cannot fly again** until repaired using an approved repair scheme\n- These inspections must happen **every 100 hours of flight time**\n- The requirement started **1 September 1971**\n\n**Why it matters:**\nCracks in a flap spar can lead to **structural failure** and potentially cause a crash. This directive forces proactive inspection to catch problems before they become catastrophic."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive sets a targeted inspection-and-repair requirement for a defined subset of Victa Airtourer aircraft. The text contains no indication that its scope has been expanded or narrowed relative to an earlier version; it specifies applicability, the inspection location, repair obligation, and a fixed inspection interval without further scope modifications."},"complexity_factors":["Narrow applicability to specific Victa Airtourer 100 and 115 aircraft and exclusion of those with Mod. B141 (Applicability)","Single, well-defined inspection focus (centre flap spar near P/N 16105/1) reduces procedural complexity (Requirement)","Clear recurring interval (every 100 hours time in service) simplifies scheduling but creates ongoing compliance burden (Compliance)","Requirement for repair \"in accordance with an approved scheme\" introduces external approval dependency and some procedural uncertainty (Requirement)","No detailed inspection or repair method specified, leaving practical variability to maintainers/approving authority (Requirement)"],"plain_english_summary":"Applies to Victa Airtourer 100/115 aeroplanes without Victa Modification B141 and with over 500 hours TIS. Requires repeated inspections of the centre flap spar around flap actuating bracket P/N 16105/1 for cracking (at intervals ≤100 hours from 1 Sep 1971) and repair per an approved scheme before further flight if cracks are found. This directs owners/operators to a recurring maintenance obligation, with associated downtime, repair approval steps and concentrated cost on the specified aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-vat-20-centre-flap-spar-inspection","history":"/api/acts/ad-vat-20-centre-flap-spar-inspection/history","analysis":"/api/acts/ad-vat-20-centre-flap-spar-inspection/analysis","conflicts":"/api/acts/ad-vat-20-centre-flap-spar-inspection/conflicts","importantCases":"/api/acts/ad-vat-20-centre-flap-spar-inspection/important-cases","documents":"/api/acts/ad-vat-20-centre-flap-spar-inspection/documents"}}