{"id":"F2006B08992","name":"AD/DHA-3/9 - Battery Master Switch Insulation - Modification","slug":"ad-dha-3-9-battery-master-switch-insulation-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52626,"registerId":"commonwealth-F2006B08992-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHA-3/9 - Battery Master Switch Insulation - Modification","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-3/9 Battery Master Switch Insulation - Modification 5/55\n\nApplicability: All models.\n\n \n\nDocument: 1. DH Mod. DRO 84; or\n\n \n\n2. DH TNS CT(A3) No. 90; or 3. ANO 105.1.14.14.5.10.\n\nCompliance: Forthwith.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\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":1253},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: mandating a specific safety modification (battery master switch insulation) for the DHA-3 Drover aircraft type. There is no expansion into unrelated operational or maintenance areas."},"complexity_factors":["Extremely brief text with no defined terms or conditional logic","Compliance requires obtaining and interpreting external technical documents not reproduced in the directive","Single, unambiguous applicability statement (all models)"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations.\n\n**What it does:** Requires owners and operators of **DHA-3 Drover aircraft** (all models) to modify the insulation around the **battery master switch**.\n\n**How to comply:** You must follow one of these technical documents:\n* DH Modification DRO 84; or\n* DH Technical News Sheet CT(A3) No. 90; or\n* Airworthiness Notice Order 105.1.14.14.5.10\n\n**When:** Immediately (\"forthwith\"). This means the aircraft cannot legally fly until the modification is done."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dha-3-9-battery-master-switch-insulation-modification","history":"/api/acts/ad-dha-3-9-battery-master-switch-insulation-modification/history","analysis":"/api/acts/ad-dha-3-9-battery-master-switch-insulation-modification/analysis","conflicts":"/api/acts/ad-dha-3-9-battery-master-switch-insulation-modification/conflicts","importantCases":"/api/acts/ad-dha-3-9-battery-master-switch-insulation-modification/important-cases","documents":"/api/acts/ad-dha-3-9-battery-master-switch-insulation-modification/documents"}}