{"id":"F2006B07543","name":"AD/VAT/10 Amdt 6 - Landing Gear Attachment Bolts - Replacement","slug":"ad-vat-10-amdt-6-landing-gear-attachment-bolts-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50129,"registerId":"commonwealth-F2006B07543-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/VAT/10 Amdt 6 - Landing Gear Attachment Bolts - 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/10\n\nAmdt 6\n\n\nLanding Gear Attachment Bolts - Replacement 11/74\n\n \n\nApplicability: Airtourer 100, 115 and 150 series. Airtourer T6 Series.\n\n \n\nRequirement: 1. For Airtourer 100, 115 and 150 series aeroplanes replace special bolts as per Aerospace SB No. 031.\n\n \n\n2.    For Airtourer T6 series aeroplanes replace special bolts as per Aerospace SB No. 032.\n\n \n\n3.    Alternatively, replace time expired special bolts in Paras. 1 and 2 with AN steel bolts of equivalent length and diameter.\n\n \n\nCompliance: For Paras. 1 and 2 - At intervals not exceeding 350 hours time in service.\n\n \n\nFor Para. 3 - 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","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard maintenance directive with narrow, specific scope. It addresses exactly what it purports to address: bolt replacement on specific aircraft models. No scope creep evident."},"complexity_factors":["Very short document (under 200 words)","Only 3 substantive requirements with clear alternatives","Simple conditional structure (if Series X, do Y; if Series Z, do Z)","No defined terms section or cross-references to other legislation","Single compliance metric (flight hours) with straightforward intervals","No nested exceptions or complex temporal provisions"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires owners and operators of specific light aircraft to replace certain bolts on their landing gear.\n\n**Which planes are affected?**\n- Victa and A.E.S.L. Airtourer 100, 115, and 150 series\n- Airtourer T6 series\n\n**What must be done?**\nOwners must replace special attachment bolts on the landing gear according to specific manufacturer service bulletins:\n- For 100/115/150 series: follow Aerospace Service Bulletin No. 031\n- For T6 series: follow Aerospace Service Bulletin No. 032\n\n**Alternative option:**\nInstead of the special bolts, owners may use standard AN (Army-Navy specification) steel bolts of the same size, but these must be replaced more frequently.\n\n**How often?**\n- Special bolts: every 350 hours of flight time\n- Standard AN bolts: every 100 hours of flight time\n\n**Why this matters:**\nLanding gear bolts are critical safety components. If they fail, the landing gear could collapse during takeoff or landing. This directive ensures potentially defective or worn bolts are replaced before they become dangerous."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"This Amendment (Amdt 6) sets out two alternative compliance options and different mandatory replacement intervals. Paragraphs 1 and 2 require replacement according to Aerospace SB No. 031 (Airtourer 100/115/150) or No. 032 (Airtourer T6) (\"Requirement: 1\" and \"Requirement: 2\"). Paragraph 3 provides an explicit alternative allowing substitution with AN steel bolts of equivalent length and diameter (\"Requirement: 3\"). The Compliance provision then imposes different maximum intervals for the two approaches (350 hours for the SB-based replacements; 100 hours for the AN steel bolts) (\"Compliance\"). These elements indicate a change in scope by authorising an alternative bolt type and by differentiating the permitted replacement intervals for each option."},"complexity_factors":["Multiple aircraft models covered (Airtourer 100, 115, 150 and T6 series) requiring operators to check applicability.","Two alternative compliance routes (Aerospace SB procedures vs AN steel bolt substitution) with different technical specifications and consequences (Requirements 1–3).","Different compliance intervals depending on the chosen route (350 hours for SB route; 100 hours for AN steel bolt route) increasing administrative tracking complexity (Compliance).","Reference to external service bulletins (Aerospace SB No. 031 and No. 032) creates dependency on external technical documents not reproduced in the AD text (Requirement 1–2).","Technical term 'special bolts' is used without additional definition in this text, requiring technical interpretation by maintenance personnel (Requirement)."],"plain_english_summary":"This AD requires owners/operators of Victa/A.E.S.L. Airtourer 100/115/150 and T6 aeroplanes to periodically replace the landing-gear attachment \"special bolts\" using either the Aerospace service-bulletin procedure (longer interval) or by substituting equivalent AN steel bolts (shorter interval). \n\nIt matters because operators must choose a compliance route, pay for parts and labour, track time‑in‑service and maintenance records, and accept the tradeoffs in replacement frequency and parts sourcing."}},"importantCases":[],"_links":{"self":"/api/acts/ad-vat-10-amdt-6-landing-gear-attachment-bolts-replacement","history":"/api/acts/ad-vat-10-amdt-6-landing-gear-attachment-bolts-replacement/history","analysis":"/api/acts/ad-vat-10-amdt-6-landing-gear-attachment-bolts-replacement/analysis","conflicts":"/api/acts/ad-vat-10-amdt-6-landing-gear-attachment-bolts-replacement/conflicts","importantCases":"/api/acts/ad-vat-10-amdt-6-landing-gear-attachment-bolts-replacement/important-cases","documents":"/api/acts/ad-vat-10-amdt-6-landing-gear-attachment-bolts-replacement/documents"}}