{"id":"F2006B08887","name":"AD/DH 104/9 - Aileron, Rudder and Elevator Hinge Links and Brackets and Tailplane Upper Attachment Fittings - Inspection","slug":"ad-dh-104-9-aileron-rudder-and-elevator-hinge-links-and-brackets-and-tailplane-upper-attachment-fitt","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52371,"registerId":"commonwealth-F2006B08887-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH 104/9 - Aileron, Rudder and Elevator Hinge Links and Brackets and Tailplane Upper Attachment Fittings - 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)  DH 104 (Dove) Series Aeroplanes\n\n \n\nAD/DH 104/9 Aileron, Rudder and Elevator Hinge Links and\n\nBrackets and Tailplane Upper Attachment Fittings - Inspection\n\nApplicability: All models not modified in accordance with Mod. 841, 842 and 843. Document:  1. De Havilland TNS CT(104) No. 123 Issue 4; or\n\n2. ANO 105.1.1.4.13.6.8.\n\n \n\nCompliance: At intervals not exceeding 200 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\n8/71\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1467},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: mandating specific structural inspections for the DH 104 Dove aircraft type. There is no evidence of scope expansion beyond the original airworthiness safety purpose."},"complexity_factors":["Single compliance requirement (recurring 200-hourly inspection)","Clear applicability criterion (unmodified aircraft only)","References to only two external technical documents for inspection procedures","No nested conditions, exceptions, or defined terms section","Extremely brief instrument (less than 150 words of substantive regulatory text)"],"plain_english_summary":"**What this requires:** Owners and operators of De Havilland DH 104 (Dove) aircraft must inspect specific control surface components—the hinge links and brackets for the ailerons, rudder, and elevator, plus the upper attachment fittings for the tailplane.\n\n**Who must comply:** Anyone operating a DH 104 Dove that has **not** been modified according to Modification Numbers 841, 842, or 843.\n\n**When to do it:** Every 200 hours of flight time (called \"time in service\"), starting from 1 September 1971.\n\n**Why it matters:** These inspections prevent structural failures in critical flight control surfaces and the tailplane attachment points, which could lead to loss of aircraft control.\n\n**Technical references:** The inspections must follow procedures set out in either:\n* De Havilland Technical Note TNS CT(104) No. 123 Issue 4, or  \n* Airworthiness Notice ANO 105.1.1.4.13.6.8."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-104-9-aileron-rudder-and-elevator-hinge-links-and-brackets-and-tailplane-upper-attachment-fitt","history":"/api/acts/ad-dh-104-9-aileron-rudder-and-elevator-hinge-links-and-brackets-and-tailplane-upper-attachment-fitt/history","analysis":"/api/acts/ad-dh-104-9-aileron-rudder-and-elevator-hinge-links-and-brackets-and-tailplane-upper-attachment-fitt/analysis","conflicts":"/api/acts/ad-dh-104-9-aileron-rudder-and-elevator-hinge-links-and-brackets-and-tailplane-upper-attachment-fitt/conflicts","importantCases":"/api/acts/ad-dh-104-9-aileron-rudder-and-elevator-hinge-links-and-brackets-and-tailplane-upper-attachment-fitt/important-cases","documents":"/api/acts/ad-dh-104-9-aileron-rudder-and-elevator-hinge-links-and-brackets-and-tailplane-upper-attachment-fitt/documents"}}