{"id":"F2006B08820","name":"AD/DC4/15 - Anti-Drag Position Stud - Revision","slug":"ad-dc4-15-anti-drag-position-stud-revision","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52238,"registerId":"commonwealth-F2006B08820-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DC4/15 - Anti-Drag Position Stud - Revision","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)  Douglas DC4 Series Aeroplanes\n\n \n\n \n\n| AD/DC4/15 | Anti-Drag Position Stud - Revision | NK |\n| --- | --- | --- |\n| Document: | 1. Douglas SB (DC4) No. 46, dated 21 January 1947; or |  |\n|  | 2. ANO 105.1.16.2.5.14, Issue 2. |  |\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 \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":4,"scope_assessment":{"changed":true,"description":"The entry is presented as a \"Revision\" of AD/DC4/15 (title: \"Anti-Drag Position Stud - Revision\"), indicating it modifies a prior directive. The schedule entry replaces or updates the AD by pointing to the authoritative technical documents to be followed (the two listed Documents). The supplied text does not specify the prior scope or the exact changes; it only shows that the AD has been revised and identifies the documents now associated with the directive."},"complexity_factors":["Cross-reference to external technical documents rather than including procedural detail in the AD entry (see Document list: \"Douglas SB (DC4) No. 46, dated 21 January 1947\" and \"ANO 105.1.16.2.5.14, Issue 2\").","Short, title-only format in the schedule entry (the AD is listed as \"AD/DC4/15 | Anti-Drag Position Stud - Revision\") meaning implementers must obtain and interpret other documents for action.","Potential vintage and technical specificity of the referenced material (one document dated 1947) which can increase practical implementation difficulty for modern maintainers.","Regulatory enforcement and applicability are determined by CASA under Civil Aviation Regulations 1998 Part 39, requiring familiarity with aviation regulatory processes.","Unstated details in the schedule (no explicit compliance times, methods or consequences in the supplied text) increase reliance on external documents and regulatory interpretation."],"plain_english_summary":"This airworthiness directive for Douglas DC‑4 series aeroplanes (AD/DC4/15) requires owners/operators and maintenance organisations to carry out the corrective inspections or actions specified in one of two referenced technical documents (Douglas SB No.46 or ANO 105.1.16.2.5.14) to address the anti‑drag position stud. CASA issues and enforces the AD; compliance — and related costs, downtime and technical work — fall to the operator."},"kimi_summary":{"content_quality":"rejected","complexity_score":2,"rejection_reason":"This appears to be a fragment, navigation page, or metadata stub from a document management system (Aspose.Words generator metadata, empty table cells, placeholder image reference). It lacks substantive legislative text, operative provisions, or the actual content of the Airworthiness Directive. The 'body' consists almost entirely of whitespace and empty table cells. This is not analysable legislation.","scope_assessment":{"changed":false,"description":"This appears to be a discrete airworthiness directive for a specific aircraft type (DC-4) and specific component (anti-drag position stud). There is no evidence in the extract of scope creep; it maintains the narrow, technical safety purpose typical of ADs."},"complexity_factors":["Extremely short document (effectively a table entry with metadata)","No legislative text or operative provisions visible in the extract","No defined terms section","No conditional logic or exceptions","Simple cross-reference to external technical documents (Service Bulletin and ANO)","Appears to be a schedule entry or index record rather than substantive legislation"],"plain_english_summary":"This document is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) for **Douglas DC-4 series aircraft**.\n\n**What it does:**\nThis directive mandates a specific safety modification or inspection regarding an **\"Anti-Drag Position Stud\"** — a component on the aircraft. The \"Revision\" in the title suggests this is an updated version of a previous directive.\n\n**Who it affects:**\n*   **Owners and operators** of Douglas DC-4 series aeroplanes (a vintage four-engine propeller aircraft from the 1940s).\n*   **Maintenance engineers** responsible for keeping these aircraft airworthy.\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety orders. They exist to address unsafe conditions found in aircraft, engines, or parts. If an operator doesn't comply with this directive, their aircraft cannot legally fly in Australian airspace. This particular directive references older technical documents (a 1947 Douglas Service Bulletin and an Air Navigation Order), indicating it deals with legacy safety issues on what are now historic or heritage aircraft.\n\n**Key technical references:**\n*   Douglas Service Bulletin (DC4) No. 46, dated 21 January 1947\n*   ANO 105.1.16.2.5.14, Issue 2 (an older Air Navigation Order)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-dc4-15-anti-drag-position-stud-revision","history":"/api/acts/ad-dc4-15-anti-drag-position-stud-revision/history","analysis":"/api/acts/ad-dc4-15-anti-drag-position-stud-revision/analysis","conflicts":"/api/acts/ad-dc4-15-anti-drag-position-stud-revision/conflicts","importantCases":"/api/acts/ad-dc4-15-anti-drag-position-stud-revision/important-cases","documents":"/api/acts/ad-dc4-15-anti-drag-position-stud-revision/documents"}}