{"id":"F2006B08981","name":"AD/DHA-3/24 Amdt 1 - Tailplane Spar and Elevator Hinge Stiffener Bracket - Inspection","slug":"ad-dha-3-24-amdt-1-tailplane-spar-and-elevator-hinge-stiffener-bracket-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52598,"registerId":"commonwealth-F2006B08981-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHA-3/24 Amdt 1 - Tailplane Spar and Elevator Hinge Stiffener Bracket - 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)  DHA-3 (Drover) Series Aeroplanes\n\n \n\nAD/DHA-3/24\n\nAmdt 1\n\n\nTailplane Spar and Elevator Hinge Stiffener Bracket - Inspection\n\n\n9/71\n\n \n\nApplicability: All models Mk. 2, 3, and 3A. Document:  DHTNS CT (A3) No. 125.\n\nCompliance: At intervals not exceeding 500 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\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1852},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"Amendment 1 maintains the original narrow scope of AD/DHA-3/24. It continues to apply solely to structural inspections of the tailplane and elevator components on DHA-3 Drover aircraft series, without expansion to additional aircraft types, systems, or operational requirements."},"complexity_factors":["Single operational requirement with no exceptions or conditional triggers","Only three applicability criteria (specific aircraft models)","Straightforward compliance metric (500 hours time in service)","No cross-references to other legislative instruments beyond the enabling Civil Aviation Regulations"],"plain_english_summary":"**What this means:**\n\nIf you own or operate a **DHA-3 Drover** aircraft (models Mk. 2, 3, or 3A), you must have a licensed aircraft maintenance engineer inspect two critical tail components at least once every **500 hours of flying time**:\n\n- The **tailplane spar** (the main structural beam that supports the tail)\n- The **elevator hinge stiffener bracket** (a reinforcement plate where the elevator control surface attaches)\n\n**Why it matters:**\nThese parts are essential for keeping the aircraft stable and controllable. The inspection checks for metal fatigue, cracks, or corrosion that could cause structural failure in flight.\n\n**What you need to do:**\nFollow the technical procedures in document **DHTNS CT (A3) No. 125** (the manufacturer's instruction manual for this check) every 500 flight hours. Do not skip this — it's mandatory for airworthiness."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dha-3-24-amdt-1-tailplane-spar-and-elevator-hinge-stiffener-bracket-inspection","history":"/api/acts/ad-dha-3-24-amdt-1-tailplane-spar-and-elevator-hinge-stiffener-bracket-inspection/history","analysis":"/api/acts/ad-dha-3-24-amdt-1-tailplane-spar-and-elevator-hinge-stiffener-bracket-inspection/analysis","conflicts":"/api/acts/ad-dha-3-24-amdt-1-tailplane-spar-and-elevator-hinge-stiffener-bracket-inspection/conflicts","importantCases":"/api/acts/ad-dha-3-24-amdt-1-tailplane-spar-and-elevator-hinge-stiffener-bracket-inspection/important-cases","documents":"/api/acts/ad-dha-3-24-amdt-1-tailplane-spar-and-elevator-hinge-stiffener-bracket-inspection/documents"}}