{"id":"F2006B08976","name":"AD/DHA-3/2 - Wing Assembly - Modification","slug":"ad-dha-3-2-wing-assembly-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52583,"registerId":"commonwealth-F2006B08976-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHA-3/2 - Wing Assembly - 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-3/2 Wing Assembly - Modification 11/52\n\nApplicability: All models.\n\n \n\nDocument: 1. DH TNS CT(A3) No. 24 or 38, and CT(A3) Nos. 2 and 25; or\n\n \n\n2. ANO 105.1.14.14.5.3.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue safety directive focused specifically on wing modifications for one aircraft type. It has not expanded beyond its original purpose; Airworthiness Directives are inherently narrow, technical instruments addressing specific safety concerns."},"complexity_factors":["Extremely short document—only a few lines of operative text","No defined terms section; relies entirely on external technical references","Simple unconditional command structure ('Compliance: Forthwith')","Single applicability criterion ('All models') with no exceptions or conditions","Cross-references to external technical documents rather than internal legislative provisions","No penalty provisions, enforcement mechanisms, or procedural requirements contained within the instrument itself"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998. It applies to all models of the **DHA-3 Drover** aircraft—a small, three-engine utility plane originally built in Australia in the 1950s.\n\n**What it does:**\nThe directive orders a **mandatory modification to the wing assembly** of these aircraft. Owners and operators must carry out this change immediately (\"forthwith\") to ensure the plane remains safe to fly.\n\n**Who it affects:**\n- Anyone who owns or operates a DHA-3 Drover aircraft\n- Maintenance engineers working on these planes\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety orders. If you don't comply, you cannot legally fly the aircraft. This particular directive references specific technical documents (service bulletins and an Air Navigation Order) that detail exactly what modification must be made to the wings. The \"11/52\" likely refers to the date of the original technical notice—November 1952—suggesting this is a very old aircraft type with ongoing safety oversight.\n\n**Key takeaway:** If you have a DHA-3 Drover, you must modify its wings according to the specified technical documents, and you must do it now."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument, as provided, sets out a straightforward, immediate requirement that applies to all DHA-3 models and points to external documents for the technical instructions. There is no indication within this text that the directive changes scope from any prior stated intent; it consistently applies to all models and mandates the wing modification immediately (sections: \"Applicability\", \"Document\", \"Compliance\")."},"complexity_factors":["Very short text with a single clear requirement (modification of wing assembly).","Applicability is simple and unambiguous: all models.","Compliance deadline is immediate (\"Forthwith\").","Key technical and procedural detail is externalised to two referenced documents, so understanding/implementation requires obtaining and reading those documents.","No procedural or enforcement detail in the directive itself (e.g. no stated approval process for alternative methods, no penalties, no timelines beyond \"forthwith\")."],"plain_english_summary":"This AD mandates an immediate modification to the wing assembly of all DHA-3 (Drover) aircraft. Operators/maintenance organisations must carry out the work forthwith using the procedures in the referenced technical documents (DH TNS CT(A3) Nos. 24/38 and CT(A3) Nos. 2/25, and ANO 105.1.14.14.5.3). Responsibility for arranging and performing the modification rests with the owner/operator."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dha-3-2-wing-assembly-modification","history":"/api/acts/ad-dha-3-2-wing-assembly-modification/history","analysis":"/api/acts/ad-dha-3-2-wing-assembly-modification/analysis","conflicts":"/api/acts/ad-dha-3-2-wing-assembly-modification/conflicts","importantCases":"/api/acts/ad-dha-3-2-wing-assembly-modification/important-cases","documents":"/api/acts/ad-dha-3-2-wing-assembly-modification/documents"}}