{"id":"F2006B08786","name":"AD/DC3/1 - Wing Tip Root Reinforcement","slug":"ad-dc3-1-wing-tip-root-reinforcement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52122,"registerId":"commonwealth-F2006B08786-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DC3/1 - Wing Tip Root Reinforcement","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)  Douglas DC3 Series Aeroplanes\n\n \n\nAD/DC3/1 Wing Tip Root Reinforcement NK\n\nDocument: 1. Douglas SB (DC3) No. 215 Section 1 and Supplement No. 1 dated 30 November\n\n1943; or\n\n \n\n2. Douglas SL dated 19 October 1943; or 3. FAA AD 43-45-1; or\n\n4. ANO 105.1.16.1.5.1.\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 airworthiness directive focused specifically on structural reinforcement of DC-3 wing tips. It has not expanded beyond its original technical safety purpose. The document appears complete as issued."},"complexity_factors":["Extremely short document — essentially a single requirement with reference list","Only one substantive operational requirement (wing tip root reinforcement)","Four alternative compliance documents provided (no complex conditional logic)","No defined terms section — relies entirely on external technical references","No cross-referencing to other legislation or regulatory parts within the text itself","Simple structure: title, affected aircraft type, requirement, reference documents"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** for **Douglas DC-3 aircraft** — the famous 'Dakota' planes that were workhorses of aviation from the 1930s onwards.\n\n**What it does:**\nThe directive requires owners and operators of DC-3 series aeroplanes to reinforce the **wing tip root** — the area where the outer wing section connects to the main wing structure. This is a structural safety modification to prevent fatigue or stress failures in this critical area.\n\n**Who it affects:**\n- Owners and operators of Douglas DC-3 series aircraft still flying in Australia\n- Maintenance organisations servicing these aircraft\n- The Civil Aviation Safety Authority (CASA), which enforces compliance\n\n**Why it matters:**\nEven though DC-3s are vintage aircraft (most built in the 1930s-1940s), several remain in active service for cargo, tourism, and historical flights. Airworthiness Directives are legally binding safety orders. Failing to comply means the aircraft cannot legally fly. This particular AD references original manufacturer bulletins from **1943**, showing how aviation safety relies on decades-old technical documentation that remains legally enforceable today.\n\n**How to comply:**\nOperators must follow one of four approved technical documents — essentially original factory service bulletins or equivalent FAA (American) or Australian safety notices from World War II era."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The supplied AD text does not show any change in scope from the original intent. The AD title and the documents it references indicate the directive concerns reinforcement of the DC‑3 wing tip root; all cited material (Douglas service documents dated 1943, FAA AD 43‑45‑1 and ANO 105.1.16.1.5.1) aligns with that subject. No language in the excerpt expands or narrows the set of affected aircraft or prescribes additional unrelated measures."},"complexity_factors":["Reference to multiple external technical documents (Douglas SB No. 215 and Supplement, Douglas SL, FAA AD 43-45-1, ANO 105.1.16.1.5.1) increases procedural complexity because implementers must reconcile instructions across sources.","Technical nature of structural reinforcement work requires certified maintenance organisations, skilled labour and potentially custom parts or fabrication for vintage DC‑3 airframes.","Age of referenced materials (documents dated 1943) raises practical complexity: locating, interpreting, and applying historical service instructions to present‑day practices.","Regulatory mandatory status under Civil Aviation Regulations 1998, Part 39 makes compliance non‑optional for affected Australian‑registered aircraft, so legal and record‑keeping obligations accompany the technical work.","Potential coordination required between international directives (FAA AD) and Australian ANO/CASA practice can create procedural and approval complexity.","Absence of text here specifying alternative compliance routes or timelines means implementers must consult the referenced documents and CASA guidance, adding administrative steps."],"plain_english_summary":"This airworthiness directive requires reinforcement of the wing tip root on Douglas DC‑3 series aeroplanes to address an airworthiness concern. It compels owners/operators and their maintenance organisations to carry out the mandated structural work in line with the referenced technical instructions.\n\nCASA enforces the AD under Part 39; operators bear parts, labour and downtime costs and must schedule and document compliance to keep the aircraft airworthy."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dc3-1-wing-tip-root-reinforcement","history":"/api/acts/ad-dc3-1-wing-tip-root-reinforcement/history","analysis":"/api/acts/ad-dc3-1-wing-tip-root-reinforcement/analysis","conflicts":"/api/acts/ad-dc3-1-wing-tip-root-reinforcement/conflicts","importantCases":"/api/acts/ad-dc3-1-wing-tip-root-reinforcement/important-cases","documents":"/api/acts/ad-dc3-1-wing-tip-root-reinforcement/documents"}}