{"id":"F2006B08875","name":"AD/DH 104/32 - Main and Nose Undercarriage Radius Rod Adjusting Screws - Replacement","slug":"ad-dh-104-32-main-and-nose-undercarriage-radius-rod-adjusting-screws-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52299,"registerId":"commonwealth-F2006B08875-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH 104/32 - Main and Nose Undercarriage Radius Rod Adjusting Screws - 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)  DH 104 (Dove) Series Aeroplanes\n\n \n\nAD/DH 104/32 Main and Nose Undercarriage Radius Rod\n\nAdjusting Screws - Replacement\n\n\n5/73\n\n \n\nApplicability: All models.\n\n \n\nDocument: Hawker Siddeley TNS CT(104) No. 231.\n\n \n\nCompliance: Before 1 November 1973 unless already accomplished.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\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, time-bound safety directive issued under Part 39 of the Civil Aviation Regulations 1998. It addresses a specific mechanical defect in a specific aircraft type. There is no indication of scope creep; it remains tightly focused on the original safety purpose of mandating replacement of undercarriage components."},"complexity_factors":["Extremely short document (under 200 words)","No defined terms section — all language is plain technical aviation terminology","No cross-references to other legislation beyond the enabling Civil Aviation Regulations 1998","Single, unambiguous compliance requirement with one clear deadline","No conditional logic, exceptions, or nested provisions","Straightforward applicability ('All models') with no exclusions"],"plain_english_summary":"This is an **Airworthiness Directive** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nOrders owners and operators of **DH 104 (Dove) series aeroplanes** — a British twin-engine aircraft from the 1940s-60s — to replace specific parts on the landing gear (the \"main and nose undercarriage radius rod adjusting screws\") before a deadline.\n\n**Who it affects:**\nAnyone who owns, operates, or maintains a DH 104 Dove aircraft in Australia. This includes private owners, flying clubs, and any organisation operating these vintage planes.\n\n**Why it matters:**\nRadius rods are structural components that help keep the landing gear properly aligned. If the adjusting screws fail or are defective, the landing gear could collapse during takeoff or landing — a catastrophic safety risk. This directive forces a proactive replacement to prevent accidents.\n\n**Key details:**\n- **Deadline:** Before 1 November 1973 (unless already done)\n- **Source document:** Hawker Siddeley Technical Note CT(104) No. 231\n- **Applies to:** All models of the DH 104 Dove"},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument applies to all DH 104 models and prescribes replacement of the specified undercarriage screws by a stated date, referencing a manufacturer technical document. The supplied text contains no material indicating a change of scope from an earlier or original intent."},"complexity_factors":["Single required action: replacement of specific components (stated in title/subject).","Universal applicability within the type: \"All models\" (Applicability: All models).","Fixed compliance deadline: before 1 November 1973 (Compliance: Before 1 November 1973 unless already accomplished).","Procedural detail delegated to an external technical document (Document: Hawker Siddeley TNS CT(104) No. 231).","Minimal procedural or enforcement detail in the text supplied (directive short and prescriptive)."],"plain_english_summary":"This instrument requires owners/operators of all DH 104 (Dove) series aeroplanes to replace the main and nose undercarriage radius rod adjusting screws, carried out per Hawker Siddeley TNS CT(104) No. 231. The work must be completed (unless already done) before 1 November 1973. It matters because operators bear the cost, must obtain and follow the technical instruction, and meet a fixed deadline that affects maintenance scheduling."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-104-32-main-and-nose-undercarriage-radius-rod-adjusting-screws-replacement","history":"/api/acts/ad-dh-104-32-main-and-nose-undercarriage-radius-rod-adjusting-screws-replacement/history","analysis":"/api/acts/ad-dh-104-32-main-and-nose-undercarriage-radius-rod-adjusting-screws-replacement/analysis","conflicts":"/api/acts/ad-dh-104-32-main-and-nose-undercarriage-radius-rod-adjusting-screws-replacement/conflicts","importantCases":"/api/acts/ad-dh-104-32-main-and-nose-undercarriage-radius-rod-adjusting-screws-replacement/important-cases","documents":"/api/acts/ad-dh-104-32-main-and-nose-undercarriage-radius-rod-adjusting-screws-replacement/documents"}}