{"id":"F2006B08974","name":"AD/DHA-3/18 - Fuselage - Cross Beam and Attachment Brackets at Firewall - Modification","slug":"ad-dha-3-18-fuselage-cross-beam-and-attachment-brackets-at-firewall-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52575,"registerId":"commonwealth-F2006B08974-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHA-3/18 - Fuselage - Cross Beam and Attachment Brackets at Firewall - 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-3/18 Fuselage - Cross Beam and Attachment\n\nBrackets at Firewall - Modification\n\n\n5/58\n\n \n\nApplicability: All models.\n\n \n\nDocument: 1. DH TNS CT(A3) No. 106; or\n\n \n\n2. DH Mod. DRO 97. Compliance: 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":2456},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive remains tightly focused on its original purpose: mandating a specific structural modification for one aircraft type (DHA-3 Drover). It has not expanded in scope beyond addressing the safety of the firewall attachment brackets."},"complexity_factors":["Extremely brief text with fewer than 100 words of substantive content","No defined terms or interpretation sections","Relies entirely on external technical documents (manufacturer's service bulletins) for implementation details","No conditional exemptions, exceptions, or nested logic","Single, unambiguous applicability statement"],"plain_english_summary":"**What this does**\nThis Airworthiness Directive (a legally binding safety rule) orders an urgent structural modification to the fuselage cross beam and attachment brackets located at the firewall on all DHA-3 Drover aircraft.\n\n**Who it affects**\nOwners and operators of DHA-3 Drover aeroplanes (a type of utility aircraft originally manufactured by de Havilland Australia).\n\n**What must be done**\nThe aircraft must be modified by following the instructions in one of these two technical documents:\n* de Havilland Technical Notes CT(A3) No. 106; **or**\n* de Havilland Modification DRO 97\n\n**When**\nImmediately. The term \"Forthwith\" means you must comply without delay as soon as the directive applies.\n\n**Why it matters**\nThis directive addresses specific structural safety concerns with the firewall attachment brackets. Without this modification, the structural integrity of the aircraft could be compromised, affecting flight safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dha-3-18-fuselage-cross-beam-and-attachment-brackets-at-firewall-modification","history":"/api/acts/ad-dha-3-18-fuselage-cross-beam-and-attachment-brackets-at-firewall-modification/history","analysis":"/api/acts/ad-dha-3-18-fuselage-cross-beam-and-attachment-brackets-at-firewall-modification/analysis","conflicts":"/api/acts/ad-dha-3-18-fuselage-cross-beam-and-attachment-brackets-at-firewall-modification/conflicts","importantCases":"/api/acts/ad-dha-3-18-fuselage-cross-beam-and-attachment-brackets-at-firewall-modification/important-cases","documents":"/api/acts/ad-dha-3-18-fuselage-cross-beam-and-attachment-brackets-at-firewall-modification/documents"}}