{"id":"F2006B04476","name":"AD/BELL 206/20 Amdt 1 - Cyclic Control Installation - Fitment of Balance Spring","slug":"ad-bell-206-20-amdt-1-cyclic-control-installation-fitment-of-balance-spring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44313,"registerId":"commonwealth-F2006B04476-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/20 Amdt 1 - Cyclic Control Installation - Fitment of Balance Spring","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 Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters\n\n \n\nAD/BELL 206/20\n\nAmdt 1\n\n\nCyclic Control Installation - Fitment of Balance Spring\n\n\n2/71\n\n \n\nApplicability: All model 206A with S/Nos. 4 to 303 equipped with Stabilizator Control Augmentation System.\n\n \n\nDocument: Bell SL 206A-104 Rev. C Part 1. Compliance: Before 1 September 1971.\n\nNote: Aircraft complying with the previous issue of this Directive automatically comply with this issue.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2097},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This Amendment 1 does not appear to alter the scope of the original directive. The note indicates that aircraft complying with the previous issue automatically comply with this issue, suggesting this is an administrative update (likely updating the referenced document revision) rather than an expansion of requirements or affected aircraft."},"complexity_factors":["Single, specific compliance action (fitment of one part)","Narrow applicability limited to specific serial number range (S/Nos. 4-303)","No cross-references to other legislative provisions","Fixed compliance date with no conditional extensions","Only one external technical document referenced"],"plain_english_summary":"**What this is:** This is a safety order (technically called an Airworthiness Directive) issued by the aviation safety regulator for certain Bell helicopters. It mandates a specific mechanical fix to prevent control issues.\n\n**Who it affects:** Owners and operators of **Bell 206A helicopters** with serial numbers between 4 and 303 that are equipped with a \"Stabilizator Control Augmentation System\" (a stability control system).\n\n**What you must do:** You must install a **balance spring** on the cyclic control system (the main control stick that pilots use to steer the helicopter). You must follow the instructions in Bell Service Letter 206A-104, Revision C, Part 1.\n\n**Deadline:** This work had to be completed before **1 September 1971**.\n\n**Good news:** If your aircraft already complies with the earlier version of this directive, you don't need to do anything extra—it automatically meets this updated requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-20-amdt-1-cyclic-control-installation-fitment-of-balance-spring","history":"/api/acts/ad-bell-206-20-amdt-1-cyclic-control-installation-fitment-of-balance-spring/history","analysis":"/api/acts/ad-bell-206-20-amdt-1-cyclic-control-installation-fitment-of-balance-spring/analysis","conflicts":"/api/acts/ad-bell-206-20-amdt-1-cyclic-control-installation-fitment-of-balance-spring/conflicts","importantCases":"/api/acts/ad-bell-206-20-amdt-1-cyclic-control-installation-fitment-of-balance-spring/important-cases","documents":"/api/acts/ad-bell-206-20-amdt-1-cyclic-control-installation-fitment-of-balance-spring/documents"}}