{"id":"F2006B04695","name":"AD/BELL 47/67 Amdt 1 - Engine Oil System Flexible Lines","slug":"ad-bell-47-67-amdt-1-engine-oil-system-flexible-lines","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44458,"registerId":"commonwealth-F2006B04695-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 47/67 Amdt 1 - Engine Oil System Flexible Lines","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)  Bell Helicopter Textron 47 (All Variants) Series Helicopters\n\n \n\nAD/BELL 47/67\n\nAmdt 1\n\n\nEngine Oil System Flexible Lines 3/87\n\n \n\nApplicability: All models 47G4, 47G4A and 47G5 Helicopters used for application of agricultural chemicals.\n\n \n\nRequirement: Action in accordance with Bell SL No. 47-164.\n\n \n\nCompliance: Initially within 25 hours time in service after 16 December 1970 and thereafter at each issue of a new Maintenance Release.\n\n \n\nBackground:  Amendment 1 to this Directive brings the compliance periodicity into line with inspection interval for Maintenance Release.\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":1576},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"Amendment 1 is purely procedural. It does not expand or alter the safety scope, affected aircraft, or technical requirements. It simply adjusts the recurring compliance interval to align with existing Maintenance Release inspection cycles, reducing administrative duplication while maintaining the same safety standard."},"complexity_factors":["Single straightforward requirement referencing external technical standard","Limited applicability (three specific helicopter models in one specific use case)","Simple two-stage compliance schedule with no exceptions or exemptions","No defined terms, interpretation provisions, or conditional clauses","Document length of approximately 150 words"],"plain_english_summary":"This directive requires owners/operators of Bell 47G4, 47G4A and 47G5 helicopters used for agricultural spraying to inspect and, if needed, replace flexible engine oil hoses per Bell Service Letter No. 47-164. The first check is within 25 hours’ flight time after 16 Dec 1970 and must be repeated each time a new Maintenance Release is issued. It prevents hose degradation and leaks that can cause catastrophic engine failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-47-67-amdt-1-engine-oil-system-flexible-lines","history":"/api/acts/ad-bell-47-67-amdt-1-engine-oil-system-flexible-lines/history","analysis":"/api/acts/ad-bell-47-67-amdt-1-engine-oil-system-flexible-lines/analysis","conflicts":"/api/acts/ad-bell-47-67-amdt-1-engine-oil-system-flexible-lines/conflicts","importantCases":"/api/acts/ad-bell-47-67-amdt-1-engine-oil-system-flexible-lines/important-cases","documents":"/api/acts/ad-bell-47-67-amdt-1-engine-oil-system-flexible-lines/documents"}}