{"id":"F2006B08986","name":"AD/DHA-3/3 - Wing Engine Mount Cross Brace Tube - Modification","slug":"ad-dha-3-3-wing-engine-mount-cross-brace-tube-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52610,"registerId":"commonwealth-F2006B08986-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHA-3/3 - Wing Engine Mount Cross Brace Tube - 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-3/3 Wing Engine Mount Cross Brace Tube - Modification\n\n\n9/52\n\n \n\nApplicability: All models having wing engine mounts fitted with cross brace tube end plates of swg material at the forward end.\n\n \n\nDocument: 1. DH TNS CT(A3) No. 22; or\n\n \n\n2. ANO 105.1.14.14.5.4.\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","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1451},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted safety directive addressing a specific airworthiness issue with a particular aircraft component. The scope remains limited to the DHA-3 Drover wing engine mount modification as originally intended, with no expansion beyond the original technical safety purpose."},"complexity_factors":["Single-page document containing one specific technical requirement","No defined terms, interpretation sections, or legislative cross-references","Immediate compliance requirement with no conditional logic, exceptions, or phased implementation","Clear applicability limited to specific aircraft model (DHA-3 Drover) and specific component configuration (SWG material end plates)"],"plain_english_summary":"**What this does:** This Airworthiness Directive (a legally binding safety order issued by the Civil Aviation Safety Authority) requires immediate modification of the wing engine mount cross brace tube on DHA-3 Drover aircraft.\n\n**Who it affects:** Owners and operators of all DHA-3 (Drover) model aircraft that have wing engine mounts fitted with cross brace tube end plates made of SWG (Standard Wire Gauge) material at the forward end.\n\n**What must be done:** The aircraft must be modified in accordance with technical specifications set out in either:\n* DH TNS CT(A3) No. 22; or\n* ANO 105.1.14.14.5.4\n\n**When:** Immediately ('forthwith'). This means before the aircraft flies again.\n\n**Why it matters:** This modification addresses a structural safety issue with the engine mount. The SWG material end plates likely pose an airworthiness risk (such as fatigue, cracking, or inadequate strength), requiring immediate rectification to prevent potential engine mount failure and ensure flight safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dha-3-3-wing-engine-mount-cross-brace-tube-modification","history":"/api/acts/ad-dha-3-3-wing-engine-mount-cross-brace-tube-modification/history","analysis":"/api/acts/ad-dha-3-3-wing-engine-mount-cross-brace-tube-modification/analysis","conflicts":"/api/acts/ad-dha-3-3-wing-engine-mount-cross-brace-tube-modification/conflicts","importantCases":"/api/acts/ad-dha-3-3-wing-engine-mount-cross-brace-tube-modification/important-cases","documents":"/api/acts/ad-dha-3-3-wing-engine-mount-cross-brace-tube-modification/documents"}}