{"id":"F2006B08990","name":"AD/DHA-3/7 - Horizontal Tail Plane Attachments - Modification","slug":"ad-dha-3-7-horizontal-tail-plane-attachments-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52620,"registerId":"commonwealth-F2006B08990-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHA-3/7 - Horizontal Tail Plane Attachments - 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-3/7 Horizontal Tail Plane Attachments - Modification 9/54\n\nApplicability: All models.\n\n \n\nDocument: 1. DH Mod. DRO 80; or\n\n \n\n2. DH TNS CT(A3) No. 86’ or 3. ANO 105.1.14.14.5.8.\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":1550},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted airworthiness directive addressing a specific safety issue with the horizontal tail plane attachments of DHA-3 Drover aircraft. The scope remains limited to the specific modification required for this aircraft type."},"complexity_factors":["Very short directive with only basic applicability and compliance requirements","Relies entirely on external technical engineering documents for implementation details","No conditional logic, exceptions, or nested requirements within the directive itself","Immediate compliance requirement leaves no discretion on timing"],"plain_english_summary":"**What this does:** This is a mandatory safety order (called an Airworthiness Directive) for all models of the DHA-3 Drover aircraft. It requires aircraft owners and operators to immediately carry out a modification to the attachments that connect the horizontal tail plane (the small wings at the back of the plane) to the aircraft fuselage.\n\n**Who it affects:** Anyone who owns or operates a DHA-3 Drover series aeroplane.\n\n**What must be done:** The modification must be carried out **forthwith** (immediately) according to one of three technical engineering documents:\n- DH Modification DRO 80; or\n- DH Technical News Sheet CT(A3) No. 86; or  \n- Air Navigation Order 105.1.14.14.5.8\n\n**Why it matters:** This is a safety-critical fix. The horizontal tail plane controls the aircraft's pitch (up and down movement). If the attachments fail, the pilot could lose control of the aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dha-3-7-horizontal-tail-plane-attachments-modification","history":"/api/acts/ad-dha-3-7-horizontal-tail-plane-attachments-modification/history","analysis":"/api/acts/ad-dha-3-7-horizontal-tail-plane-attachments-modification/analysis","conflicts":"/api/acts/ad-dha-3-7-horizontal-tail-plane-attachments-modification/conflicts","importantCases":"/api/acts/ad-dha-3-7-horizontal-tail-plane-attachments-modification/important-cases","documents":"/api/acts/ad-dha-3-7-horizontal-tail-plane-attachments-modification/documents"}}