{"id":"F2006B08915","name":"AD/DH 89/3 - Interplane Strut - Inspection","slug":"ad-dh-89-3-interplane-strut-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52458,"registerId":"commonwealth-F2006B08915-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH 89/3 - Interplane Strut - 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 89 (Dragon Rapide) Series Aeroplanes\n\n \n\nAD/DH 89/3 Interplane Strut - Inspection NK\n\nApplicability: All model DH89A and Dominie. Document:  1. DH Tech. Circular No. 54; or\n\n2. ANO 105.1.14.10.6.2.\n\n \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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1749},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument maintains a narrow, targeted scope limited to specific vintage aircraft models (DH 89 Dragon Rapide and Dominie) and a single structural component (interplane struts). There is no evidence of scope expansion beyond the original safety-critical inspection purpose."},"complexity_factors":["Extremely brief text with only one substantive operational paragraph","Reliance on external technical specifications (DH Tech. Circular No. 54 and ANO 105.1.14.10.6.2) not reproduced in the instrument","Aviation-specific terminology and regulatory shorthand requiring domain knowledge to interpret fully"],"plain_english_summary":"This Airworthiness Directive mandates an **immediate safety inspection** of the interplane struts on all de Havilland DH89A and Dominie aircraft—twin-engine biplanes from the 1930s-40s.\n\n**What it requires:**\n- **Who**: Owners and operators of these specific vintage aircraft models (including the Dragon Rapide).\n- **What**: Inspect the **interplane struts**—the structural support posts connecting the upper and lower wings (critical for keeping the wings attached and stable during flight).\n- **How**: Follow the detailed inspection procedures in either *DH Technical Circular No. 54* or *Airworthiness Notice 105.1.14.10.6.2* (external technical documents referenced but not included here).\n- **When**: **Immediately** (\"forthwith\")—meaning before the next flight, without delay.\n\n**Why it matters:**\nThis is a mandatory safety order. If an interplane strut fails in flight, the wing structure could collapse. This directive likely responds to discovered fatigue, corrosion, or manufacturing defects in these aging aircraft components."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-89-3-interplane-strut-inspection","history":"/api/acts/ad-dh-89-3-interplane-strut-inspection/history","analysis":"/api/acts/ad-dh-89-3-interplane-strut-inspection/analysis","conflicts":"/api/acts/ad-dh-89-3-interplane-strut-inspection/conflicts","importantCases":"/api/acts/ad-dh-89-3-interplane-strut-inspection/important-cases","documents":"/api/acts/ad-dh-89-3-interplane-strut-inspection/documents"}}