{"id":"F2006B08571","name":"AD/CL-600/10 - Autopilot Duplex Servo - Installation of Protective Cover","slug":"ad-cl-600-10-autopilot-duplex-servo-installation-of-protective-cover","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51410,"registerId":"commonwealth-F2006B08571-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CL-600/10 - Autopilot Duplex Servo - Installation of Protective Cover","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)  Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes\n\n \n\nAD/CL-600/10 Autopilot Duplex Servo - Installation\n\nof Protective Cover Applicability: All CL600 aeroplanes listed in the requirement document. Document:              Canadair Challenger SB No. 600-0171.\n\nCompliance: Before issue of Australian Certificate of Airworthiness.\n\n \n\nBackground: To prevent foreign objects from jamming the autopilot servo capstan.\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\n3/83\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2071},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: mandating a specific physical modification (protective cover installation) for the autopilot system of CL-600 aircraft to prevent foreign object damage. No expansion of applicability or additional requirements beyond the original safety intent."},"complexity_factors":["Single, unambiguous operative requirement (install protective cover)","No defined terms or interpretation section within the instrument","Minimal cross-referencing (only one external service bulletin)","No exceptions, exemptions, or conditional logic","Extremely brief (less than one page of operative text)"],"plain_english_summary":"This Airworthiness Directive mandates a safety modification for Bombardier Challenger CL-600 aircraft.\n\n**What it requires:**\nOperators must install a protective cover on the autopilot duplex servo system, following the technical instructions in Canadair Service Bulletin No. 600-0171.\n\n**Who it affects:**\nAll CL-600 series aircraft listed in the referenced service bulletin.\n\n**When it must be done:**\nBefore the aircraft can be issued with an Australian Certificate of Airworthiness (meaning the modification is a prerequisite for legal operation).\n\n**Why it matters:**\nThe cover prevents foreign objects—such as debris, tools, or other items—from jamming the servo capstan (a rotating pulley that helps control the aircraft's movements). A jammed autopilot servo could cause sudden, unexpected aircraft movements or loss of control, creating serious safety risks during flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-10-autopilot-duplex-servo-installation-of-protective-cover","history":"/api/acts/ad-cl-600-10-autopilot-duplex-servo-installation-of-protective-cover/history","analysis":"/api/acts/ad-cl-600-10-autopilot-duplex-servo-installation-of-protective-cover/analysis","conflicts":"/api/acts/ad-cl-600-10-autopilot-duplex-servo-installation-of-protective-cover/conflicts","importantCases":"/api/acts/ad-cl-600-10-autopilot-duplex-servo-installation-of-protective-cover/important-cases","documents":"/api/acts/ad-cl-600-10-autopilot-duplex-servo-installation-of-protective-cover/documents"}}