{"id":"F2006B04514","name":"AD/BELL 206/59 - Oil Pressure Tube Assemblies - Inspection and Replacement","slug":"ad-bell-206-59-oil-pressure-tube-assemblies-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114221,"registerId":"commonwealth-F2006B04514-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/59 - Oil Pressure Tube Assemblies - Inspection and 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\nBell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters\n\n \n\n# AD/BELL 206/59 Oil Pressure Tube Assemblies - Inspection\n\nand Replacement\n\nApplicability: All models referenced in requirement documents AND\n\n# 6/74\n\n \n\nModels that have been converted from transducer to wet line instrument systems, referenced in requirement documents.\n\n \n\nDocument: Bell SB No. 206-08-74-1, or Agusta SB No. BT206-78. Compliance:  Inspect within 10 hour time in service after 20 May 1974.\n\nReplace within 100 hours time in service after 28 June 1974.\n\n \n\nBackground: AD/Agusta 206/48 equivalent.\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2090},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original, narrow scope concerning oil pressure tube assembly maintenance for specific helicopter models. It has not expanded beyond its initial safety purpose."},"complexity_factors":["Requires cross-referencing external technical documents (Service Bulletins) not included in the directive text","Uses technical aviation terminology (transducer systems, wet line instruments, time in service)","Dual compliance deadlines based on both calendar dates and accumulated flight hours","Covers multiple aircraft model variants and modified configurations"],"plain_english_summary":"This mandatory Airworthiness Directive applies to all Bell Helicopter Textron Canada and Agusta Bell 206 models (including transducer→wet‑line conversions) and requires inspection and eventual replacement of oil pressure tube assemblies to correct potential leaks or loss of oil pressure indication.\n\nInspections must be done within 10 flight hours after 20 May 1974 and replacements within 100 flight hours after 28 June 1974, per the cited Bell and Agusta service bulletins."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-59-oil-pressure-tube-assemblies-inspection-and-replacement","history":"/api/acts/ad-bell-206-59-oil-pressure-tube-assemblies-inspection-and-replacement/history","analysis":"/api/acts/ad-bell-206-59-oil-pressure-tube-assemblies-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-bell-206-59-oil-pressure-tube-assemblies-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-bell-206-59-oil-pressure-tube-assemblies-inspection-and-replacement/important-cases","documents":"/api/acts/ad-bell-206-59-oil-pressure-tube-assemblies-inspection-and-replacement/documents"}}