{"id":"F2006B04741","name":"AD/BN-2/3 - Vacuum Hose - Replacement","slug":"ad-bn-2-3-vacuum-hose-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44505,"registerId":"commonwealth-F2006B04741-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BN-2/3 - Vacuum Hose - Replacement","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-2/3 Vacuum Hose - Replacement NK\n\nApplicability: Model BN-2A with S/Nos. 1 to 15.\n\n \n\nDocument: Britten-Norman Modification Leaflet BN-2/NB/M/165, Parts 1 and 2. Compliance: Within 100 hours time in service after 13 June 1968.\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":2359},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow, technical scope addressing only the vacuum hose replacement on early-production BN-2A aircraft (serials 1-15). It has not expanded to cover other models, components, or operational requirements beyond this specific safety modification."},"complexity_factors":["Extremely brief text (under 150 words)","Narrow applicability limited to 15 specific aircraft by serial number","Single, unambiguous compliance action with no exceptions or alternatives","No defined terms or cross-references to other legislation","Clear, absolute deadline with no conditional extensions"],"plain_english_summary":"**What this is:** An Airworthiness Directive — a mandatory safety order requiring owners of specific aircraft to perform critical maintenance.\n\n**Who it affects:** Owners and operators of Pilatus Britten-Norman BN-2A Islander aircraft with serial numbers 1 through 15.\n\n**What must be done:** Replace the vacuum hose following the manufacturer's instructions in *Britten-Norman Modification Leaflet BN-2/NB/M/165, Parts 1 and 2*.\n\n**Deadline:** The replacement must be completed within 100 hours of flight time (measured from when the aircraft is airborne) after 13 June 1968.\n\n**Why it matters:** Vacuum systems power essential flight instruments (like attitude indicators and directional gyros). A failed hose could cause these instruments to fail mid-flight, creating serious safety hazards."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bn-2-3-vacuum-hose-replacement","history":"/api/acts/ad-bn-2-3-vacuum-hose-replacement/history","analysis":"/api/acts/ad-bn-2-3-vacuum-hose-replacement/analysis","conflicts":"/api/acts/ad-bn-2-3-vacuum-hose-replacement/conflicts","importantCases":"/api/acts/ad-bn-2-3-vacuum-hose-replacement/important-cases","documents":"/api/acts/ad-bn-2-3-vacuum-hose-replacement/documents"}}