{"id":"F2006B04737","name":"AD/BN-2/26 - Wing Rear Spar - Inspection","slug":"ad-bn-2-26-wing-rear-spar-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44501,"registerId":"commonwealth-F2006B04737-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BN-2/26 - Wing Rear Spar - 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)  Pilatus Britten-Norman BN-2 Series Aeroplanes\n\n \n\nAD/BN-2/26 Wing Rear Spar - Inspection 4/73\n\nApplicability: All model BN-2A.\n\n \n\nDocument: Britten Norman SB No. BN-2/SB.60. Compliance:  As detailed in the requirement document.\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":1193},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive remains tightly focused on its original purpose: mandating structural inspections of a specific aircraft type's wing spar. It has not expanded beyond this specific safety maintenance requirement."},"complexity_factors":["Extremely short text (approximately 50 words of substantive content)","Incorporation by reference of external technical document (Service Bulletin BN-2/SB.60) without reproducing contents","No definitions, exceptions, or conditional logic within the directive itself","Single, clear applicability criterion (all BN-2A models)","Requires technical aviation knowledge to interpret the referenced service bulletin"],"plain_english_summary":"This is a safety directive for aircraft owners and operators of Pilatus Britten-Norman BN-2A model aeroplanes (commonly known as Islander or Trislander aircraft). It mandates an inspection of the **wing rear spar** — a critical structural component that helps hold the wings to the fuselage.\n\n**What you must do:**\n* Follow the inspection procedures detailed in **Britten Norman Service Bulletin No. BN-2/SB.60**\n* This ensures the wing structure is safe and free from cracks or damage that could lead to wing failure\n\n**Who it affects:**\n* All BN-2A model aircraft operators\n* Maintenance engineers responsible for these aircraft\n\nThe directive works by legally requiring compliance with the manufacturer's technical service bulletin, turning a manufacturer recommendation into a legal obligation under Australian aviation safety law."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bn-2-26-wing-rear-spar-inspection","history":"/api/acts/ad-bn-2-26-wing-rear-spar-inspection/history","analysis":"/api/acts/ad-bn-2-26-wing-rear-spar-inspection/analysis","conflicts":"/api/acts/ad-bn-2-26-wing-rear-spar-inspection/conflicts","importantCases":"/api/acts/ad-bn-2-26-wing-rear-spar-inspection/important-cases","documents":"/api/acts/ad-bn-2-26-wing-rear-spar-inspection/documents"}}