{"id":"F2006B04757","name":"AD/BN-2/46 - Engine Control Shaft - Inspection","slug":"ad-bn-2-46-engine-control-shaft-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44521,"registerId":"commonwealth-F2006B04757-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BN-2/46 - Engine Control Shaft - 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-2/46 Engine Control Shaft - Inspection NK\n\nApplicability: All models.\n\n \n\nRequirement: 1. Inspect the right hand end of the engine control pivot shaft P/N NB-47-B-069 in the engine console for presence of a drilled hole, plain washers and a retaining splitpin as per Fig. 3, Section 5.1/8 of Britten Norman Parts Catalogue.\n\n \n\n2. If undrilled, drill shaft and fit washers and splitpin as per Fig. 3, Section 5.1/8 of above parts catalogue.\n\n \n\nCompliance: Within 50 hours time in service after 4 June 1980.\n\n \n\nBackground: Due to absence of a drilled hole and retaining splitpin, an engine control pivot shaft became partially withdrawn from the engine console during taxi, causing collapse of control levers and friction discs.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n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":2072},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: mandating a specific safety inspection and modification to prevent engine control shaft failure in BN-2 aircraft. No expansion of coverage or additional requirements have been added."},"complexity_factors":["Single discrete mechanical task (one component inspection)","Binary conditional logic only (drilled vs undrilled)","No exemptions, exceptions, or penalty provisions","Reference to external technical diagram rather than detailed legislative description","Approximately 100 words of operative text"],"plain_english_summary":"Owners and operators of Pilatus Britten-Norman BN-2 Islander aircraft must inspect the engine control pivot shaft (P/N NB-47-B-069) at its engine-console connection to confirm a drilled hole, plain washers, and a retaining split pin are installed per the manufacturer’s parts figure. \n\nIf any feature is missing, drill the shaft and fit washers and a split pin immediately to prevent the shaft sliding out during taxiing, which can collapse control levers and cause loss of engine control. Complete within 50 flight hours."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bn-2-46-engine-control-shaft-inspection","history":"/api/acts/ad-bn-2-46-engine-control-shaft-inspection/history","analysis":"/api/acts/ad-bn-2-46-engine-control-shaft-inspection/analysis","conflicts":"/api/acts/ad-bn-2-46-engine-control-shaft-inspection/conflicts","importantCases":"/api/acts/ad-bn-2-46-engine-control-shaft-inspection/important-cases","documents":"/api/acts/ad-bn-2-46-engine-control-shaft-inspection/documents"}}