{"id":"F2006B07557","name":"AD/VAT/24 - Rear Fuselage - Sealing of Seams and Rivets - Modification","slug":"ad-vat-24-rear-fuselage-sealing-of-seams-and-rivets-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50151,"registerId":"commonwealth-F2006B07557-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/VAT/24 - Rear Fuselage - Sealing of Seams and Rivets - 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/24 Rear Fuselage - Sealing of Seams and\n\nRivets - Modification Applicability: Victa Airtourer 100 and 115 with S/Nos. 1 to 110. Document:               Victa SB No. 55.\n\nCompliance: Within 100 hours time in service after 29 November 1965.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n\n11/65\n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD's scope is narrowly defined in the text: it applies to Victa Airtourer 100 and 115 aeroplanes with serial numbers 1–110 and requires sealing of rear fuselage seams and rivets per Victa SB No. 55 within 100 hours TIS after 29 November 1965. The document provides no indication that this scope was altered from an earlier or different statement; the AD itself contains no language suggesting a change in scope."},"complexity_factors":["Narrow and explicit applicability (Victa Airtourer 100 and 115, S/N 1–110) reduces scope complexity (Applicability).","Single, short compliance deadline specified (100 hours TIS after 29 November 1965) simplifies scheduling and legal timing (Compliance).","Single referenced method of compliance (Victa SB No. 55) concentrates procedural detail outside the AD itself (Document).","No alternatives, exemptions, or enforcement procedures are set out in the AD, which reduces internal procedural complexity but leaves external implementation and enforcement questions unresolved (AD text—no alternatives/enforcement).","Limited factual detail in the AD (no stated rationale, no cost or parts breakdown) means implementers must consult the referenced service bulletin or other sources for operational detail (Document; AD text)."],"plain_english_summary":"This directive, issued in CASA’s Schedule of Airworthiness Directives, mandates sealing seams and rivets on the rear fuselage of Victa Airtourer 100 and 115 aeroplanes (S/Ns 1–110) using Victa Service Bulletin No. 55. Operators must complete the modification within 100 hours TIS after 29 November 1965. The AD names the compliance method but gives no explicit safety rationale, cost estimates, alternative methods, or enforcement/relief procedures."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1965 with no evidence of scope creep. It addresses one specific structural modification for one aircraft type and has not been expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (under 200 words)","Only 4 defined elements: aircraft model, serial number range, reference document (Victa SB No. 55), and compliance deadline","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","Single, unambiguous compliance requirement with clear time limit","No conditional logic, exceptions, or alternative compliance methods","Straightforward applicability criteria (specific model + serial numbers)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners of specific **Victa Airtourer 100 and 115 aircraft** (serial numbers 1 to 110) to carry out a **modification to seal seams and rivets in the rear fuselage**.\n\n**What must be done:**\n- Follow the instructions in **Victa Service Bulletin No. 55** (the manufacturer's official repair notice)\n- Complete the work **within 100 hours of flying time** after 29 November 1965\n\n**Why it matters:**\nAirworthiness Directives are legally binding. If you don't comply, you cannot fly the aircraft. This particular AD addresses potential structural integrity issues in the rear fuselage — sealing seams and rivets prevents moisture ingress, corrosion, and potential failure that could endanger flight safety.\n\n**Who it affects:**\n- Owners and operators of early-model Victa Airtourer aircraft (specifically serial numbers 1–110)\n- Licensed aircraft maintenance engineers who perform the work\n\nThis is a **historical directive** from 1965, so any surviving aircraft in this category should have been modified decades ago."}},"importantCases":[],"_links":{"self":"/api/acts/ad-vat-24-rear-fuselage-sealing-of-seams-and-rivets-modification","history":"/api/acts/ad-vat-24-rear-fuselage-sealing-of-seams-and-rivets-modification/history","analysis":"/api/acts/ad-vat-24-rear-fuselage-sealing-of-seams-and-rivets-modification/analysis","conflicts":"/api/acts/ad-vat-24-rear-fuselage-sealing-of-seams-and-rivets-modification/conflicts","importantCases":"/api/acts/ad-vat-24-rear-fuselage-sealing-of-seams-and-rivets-modification/important-cases","documents":"/api/acts/ad-vat-24-rear-fuselage-sealing-of-seams-and-rivets-modification/documents"}}