{"id":"F2006B04492","name":"AD/BELL 206/37 - Anti Torque Control Idler Assembly P/N 206-001-746-5 - Inspection and Rework","slug":"ad-bell-206-37-anti-torque-control-idler-assembly-p-n-206-001-746-5-inspection-and-rework","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114186,"registerId":"commonwealth-F2006B04492-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/37 - Anti Torque Control Idler Assembly P/N 206-001-746-5 - Inspection and Rework","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\n# AD/BELL 206/37 Anti Torque Control Idler Assembly\n\nP/N 206-001-746-5 - Inspection and Rework\n\nApplicability: All models AB206A, AB206B, 206A and 206B with S/Nos. referenced in requirement documents, not incorporating SI No. 206-60.\n\n \n\nDocument: Bell SB No. 206-22, or Agusta SB No. BT206-54.\n\n# 12/72\n\n \n\nCompliance: 1. Inspect in accordance with para. 1 to 5 of SB 206-22 within 25 hours time in service after 30 November 1972.\n\n \n\n2. Rework idler in accordance with para. 6 of SB 206-22 within 100 hours time in service after 30 November 1972.\n\n \n\nBackground: AD/Agusta 206/31 equivalent.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2166},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope addressing only the specific anti-torque control idler assembly defect in defined Bell 206 helicopter models. It has not expanded beyond this specific airworthiness issue."},"complexity_factors":["Short, single-issue directive with only two distinct compliance actions","Narrow applicability limited to specific helicopter models and serial number ranges","Single exception clause (excluding aircraft with SI No. 206-60)","External technical details incorporated by reference to service bulletins","Simple time-based compliance calculation (flight hours after fixed calendar date)"],"plain_english_summary":"**What this does:** This safety directive requires owners and operators of specific Bell 206 series helicopters to check and fix a faulty part in the tail rotor control system.\n\n**Who it affects:** Owners and operators of Bell 206A, 206B, AB206A, and AB206B helicopters with specific serial numbers listed in the referenced service documents (excluding those already modified per Service Instruction No. 206-60).\n\n**What must be done:**\n- **Inspection:** Within 25 flight hours after 30 November 1972, inspect the Anti Torque Control Idler Assembly (part number 206-001-746-5) following the steps in Bell Service Bulletin 206-22 (or the Agusta equivalent).\n- **Rework:** Within 100 flight hours after that same date, rework the idler assembly according to the service bulletin instructions.\n\n**Why it matters:** The directive prevents potential failure of the tail rotor control system (the system that keeps the helicopter pointing in the right direction), which is critical for flight safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-37-anti-torque-control-idler-assembly-p-n-206-001-746-5-inspection-and-rework","history":"/api/acts/ad-bell-206-37-anti-torque-control-idler-assembly-p-n-206-001-746-5-inspection-and-rework/history","analysis":"/api/acts/ad-bell-206-37-anti-torque-control-idler-assembly-p-n-206-001-746-5-inspection-and-rework/analysis","conflicts":"/api/acts/ad-bell-206-37-anti-torque-control-idler-assembly-p-n-206-001-746-5-inspection-and-rework/conflicts","importantCases":"/api/acts/ad-bell-206-37-anti-torque-control-idler-assembly-p-n-206-001-746-5-inspection-and-rework/important-cases","documents":"/api/acts/ad-bell-206-37-anti-torque-control-idler-assembly-p-n-206-001-746-5-inspection-and-rework/documents"}}