{"id":"F2006B04359","name":"AD/BELL 205/17 - Hydraulic Fluid Temperature Indicators - Installation","slug":"ad-bell-205-17-hydraulic-fluid-temperature-indicators-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44178,"registerId":"commonwealth-F2006B04359-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 205/17 - Hydraulic Fluid Temperature Indicators - Installation","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 205 Series Helicopters\n\n \n\nAD/BELL 205/17 Hydraulic Fluid Temperature Indicators - Installation\n\n\n12/73\n\n \n\nApplicability: All model 205A-1 prior to S/No. 305153 with dual hydraulic system installed. Document:               SB No 205-06-73-1.\n\nCompliance: Within the next 50 hours time in service after 31 January 1974 or at time of installation of dual hydraulic system.\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":1563},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This airworthiness directive represents a discrete, technical safety mandate addressing a single maintenance requirement for hydraulic system monitoring equipment. The scope remains confined to the original purpose of preventing hydraulic overheating in the specified helicopter models."},"complexity_factors":["Single, unambiguous mechanical requirement","Narrow applicability restricted to specific model and serial number range","Clear compliance deadline with no conditional exceptions or extensions","No defined terms, cross-references to other legislation, or interpretive provisions","Extremely short document length (single requirement)"],"plain_english_summary":"**What this does:** This rule mandates the installation of temperature gauges (indicators) to monitor hydraulic fluid temperature on specific Bell 205A-1 helicopters.\n\n**Who it affects:** Owners and operators of Bell 205A-1 helicopters with serial numbers below 305153 that are equipped with dual hydraulic systems.\n\n**Why it matters:** Hydraulic systems can overheat during operation. Without temperature monitoring, pilots cannot detect dangerous overheating that could lead to hydraulic failure and loss of aircraft control. This safety requirement prevents mechanical failures by ensuring operators can monitor fluid temperature in real-time.\n\n**What must be done:** Install hydraulic fluid temperature indicators in accordance with Service Bulletin No. 205-06-73-1. This must be completed within 50 hours of flight time after 31 January 1974, or when the dual hydraulic system is first installed—whichever occurs first."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-205-17-hydraulic-fluid-temperature-indicators-installation","history":"/api/acts/ad-bell-205-17-hydraulic-fluid-temperature-indicators-installation/history","analysis":"/api/acts/ad-bell-205-17-hydraulic-fluid-temperature-indicators-installation/analysis","conflicts":"/api/acts/ad-bell-205-17-hydraulic-fluid-temperature-indicators-installation/conflicts","importantCases":"/api/acts/ad-bell-205-17-hydraulic-fluid-temperature-indicators-installation/important-cases","documents":"/api/acts/ad-bell-205-17-hydraulic-fluid-temperature-indicators-installation/documents"}}