{"id":"F2006B08612","name":"AD/CL-600/5 - Main Landing Gear Brake Assemblies - Inspection and Re-Identification","slug":"ad-cl-600-5-main-landing-gear-brake-assemblies-inspection-and-re-identification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51544,"registerId":"commonwealth-F2006B08612-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CL-600/5 - Main Landing Gear Brake Assemblies - Inspection and Re-Identification","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\n# AD/CL-600/5 Main Landing Gear Brake Assemblies - Inspection\n\nand Re-Identification\n\nApplicability: 1. All models S/No. 1002 and subsequent.\n\n \n\n2. All brake assemblies, P/No. 600-85083-55, held as spares. Document: Canadair Challenger SB No. A600-0045, Rev. 2.\n\nCompliance: Prior to the issue of an Australian Certificate of Airworthiness.\n\n# 3/83\n\n \n\nBackground: Inspection and re-identification of brake assemblies is required to ensure that previous rework has not created a condition that could result in a dragging brake.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific technical defect in a specific aircraft component. It has not expanded beyond its original purpose of ensuring brake assembly integrity through inspection and re-identification."},"complexity_factors":["Extremely short document — only 4 substantive paragraphs","No defined terms section; all terminology is standard aviation maintenance language","Single, unambiguous compliance requirement with clear trigger (prior to Certificate of Airworthiness issuance)","No cross-references to other legislation or regulations beyond the parenthetical citation of Civil Aviation Regulations 1998, Part 39","No conditional logic, exceptions, or alternative compliance methods","Simple binary applicability test (serial number threshold and specific part number)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order for aircraft.\n\n**What it does:**\nIt requires owners and operators of specific Bombardier Challenger business jets to inspect and re-label their main landing gear brake assemblies before the aircraft can be certified as airworthy in Australia.\n\n**Who it affects:**\n- All Bombardier (Canadair) CL-600 series aircraft with serial numbers 1002 and onwards\n- Anyone holding spare brake assemblies with part number 600-85083-55\n\n**Why it matters:**\nPrevious repairs or \"rework\" on these brakes may have caused a fault where the brake doesn't fully release — known as a \"dragging brake.\" This creates dangerous conditions: overheating, reduced braking effectiveness, potential tire blowouts, or even fire. The directive ensures these brakes are checked and properly identified before the plane flies.\n\n**What must happen:**\nThe inspection and re-identification must be completed **before CASA (the aviation safety regulator) will issue an Australian Certificate of Airworthiness** — the official document that says an aircraft is safe to fly."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive's scope is narrowly defined in the source: it applies to CL-600 series aeroplanes with serial numbers 1002 and subsequent and to spare brake assemblies with part number 600-85083-55 (Applicability 1–2). The directive requires inspection and re-identification prior to issuing an Australian Certificate of Airworthiness and points to a specific manufacturer service bulletin for procedure (Compliance; Document reference). There is no indication in the source text that the scope has been broadened or narrowed from an earlier intent; the instruction remains focused on the stated set of aircraft/parts and the pre-CoA timing requirement."},"complexity_factors":["Narrow applicability limited to CL-600 series with S/No. 1002 and subsequent and to brake assemblies P/No. 600-85083-55 (Applicability 1–2)","Single, clear required action (inspection and re-identification) with a single timing constraint (prior to Australian CoA) (Compliance)","Dependency on an external procedural document (Canadair Challenger SB No. A600-0045, Rev. 2) for the technical steps (Document reference)","Potential for downstream variability because inspection findings may require further corrective work not detailed in the directive (Background; Document reference)","Regulatory enforcement tied to certification timing rather than continuous operational requirement (Compliance)"],"plain_english_summary":"This AD requires inspection and re‑identification of main landing‑gear brake assemblies (P/N 600‑85083‑55) on Bombardier CL‑600 (Challenger) aircraft serials 1002 and later, and of spares, before an Australian Certificate of Airworthiness will be issued. Operators and spare‑holders must follow Canadair Challenger Service Bulletin A600‑0045 Rev.2, bear inspection/rework costs, and provide evidence of compliance. The measure aims to confirm past rework hasn’t created a dragging‑brake hazard."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-5-main-landing-gear-brake-assemblies-inspection-and-re-identification","history":"/api/acts/ad-cl-600-5-main-landing-gear-brake-assemblies-inspection-and-re-identification/history","analysis":"/api/acts/ad-cl-600-5-main-landing-gear-brake-assemblies-inspection-and-re-identification/analysis","conflicts":"/api/acts/ad-cl-600-5-main-landing-gear-brake-assemblies-inspection-and-re-identification/conflicts","importantCases":"/api/acts/ad-cl-600-5-main-landing-gear-brake-assemblies-inspection-and-re-identification/important-cases","documents":"/api/acts/ad-cl-600-5-main-landing-gear-brake-assemblies-inspection-and-re-identification/documents"}}