{"id":"F2006B04510","name":"AD/BELL 206/55 - Pylon Support Link P/N 206-031-508-5 and -7 - Replacement","slug":"ad-bell-206-55-pylon-support-link-p-n-206-031-508-5-and-7-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114213,"registerId":"commonwealth-F2006B04510-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/55 - Pylon Support Link P/N 206-031-508-5 and -7 - 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\n![](image.001.png)  Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters\n\n \n\nAD/BELL 206/55 Pylon Support Link P/N 206-031-508-5\n\nand -7 - Replacement\n\n\n10/73\n\n \n\nApplicability: All models.\n\n \n\nDocument: Bell SB No. 206-01-73-6.\n\n \n\nNote: Agusta SB BT206-72 refers.\n\n \n\nCompliance: Within 5 hours time in service after 5 October 1973. Background: AD/Agusta 206/41 equivalent.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2005},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow scope targeting specific structural components on specific helicopter models to address a defined safety issue."},"complexity_factors":["Single, specific mechanical action required (part replacement)","Only 2 specific part numbers affected (206-031-508-5 and -7)","Simple compliance metric: 5 hours time in service","References external technical documents (Service Bulletins) for detailed procedures"],"plain_english_summary":"**What this requires:**\n\nHelicopter owners and operators must replace specific pylon support links (parts numbered 206-031-508-5 and 206-031-508-7) on Bell 206 and Agusta Bell 206 series helicopters.\n\n**Who is affected:**\n\nAnyone operating or maintaining Bell Helicopter Textron Canada (BHTC) 206 or Agusta Bell 206 series helicopters.\n\n**Why it matters:**\n\nPylon support links are critical structural components connecting the helicopter's body to its rotor system. This directive prevents catastrophic failure of these parts, which could lead to loss of the aircraft and lives.\n\n**Compliance deadline:**\n\nThe replacement had to be completed within 5 hours of flight time after 5 October 1973.\n\n**Technical references:**\n\nOperators must follow the procedures in Bell Service Bulletin No. 206-01-73-6 (or Agusta Service Bulletin BT206-72 for Agusta models)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-55-pylon-support-link-p-n-206-031-508-5-and-7-replacement","history":"/api/acts/ad-bell-206-55-pylon-support-link-p-n-206-031-508-5-and-7-replacement/history","analysis":"/api/acts/ad-bell-206-55-pylon-support-link-p-n-206-031-508-5-and-7-replacement/analysis","conflicts":"/api/acts/ad-bell-206-55-pylon-support-link-p-n-206-031-508-5-and-7-replacement/conflicts","importantCases":"/api/acts/ad-bell-206-55-pylon-support-link-p-n-206-031-508-5-and-7-replacement/important-cases","documents":"/api/acts/ad-bell-206-55-pylon-support-link-p-n-206-031-508-5-and-7-replacement/documents"}}