{"id":"F2006B08623","name":"AD/CL-600/6 - Branson Fuel Tank - Electrical Harness - Inspection and Modification","slug":"ad-cl-600-6-branson-fuel-tank-electrical-harness-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51590,"registerId":"commonwealth-F2006B08623-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CL-600/6 - Branson Fuel Tank - Electrical Harness - Inspection and Modification","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-600/6  Branson Fuel Tank - Electrical Harness - Inspection and Modification\n\nApplicability: All CL600 aeroplanes listed in Canadair Alert SB A600-0250. Document:  1. Canadair Challenger Alert SB No. A600-0250; and\n\n2. Canadair Challenger Alert SB No. A600-0268. Compliance: Before issue of Australian Certificate of Airworthiness.\n\n# 3/83\n\nBackground: To ensure adequate clearance between electrical harnesses and Branson tank and install a barrier between the forward Branson tank and electrical harnesses.\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive’s scope as stated (apply to CL-600 aeroplanes listed in Canadair Alert SB A600-0250 and require inspection/modification per the referenced service bulletins) matches the stated background purpose to ensure clearance and install a barrier between the Branson tank and electrical harnesses (Applicability; Documents; Background; Compliance). The instrument does not broaden its own technical objective beyond those statements; it delegates technical method to the referenced service bulletins."},"complexity_factors":["Cross-reference to external technical documents (Canadair Alert SB A600-0250 and A600-0268) for procedural detail (Documents).","Mandatory timing tied to issuance of Australian Certificate of Airworthiness (Compliance) rather than a simple calendar deadline.","Operational and technical nature of the required work (inspection of harness clearance and installation of a barrier) which requires qualified maintenance input (Background; Documents).","Applicability limited to aircraft listed in a specific service bulletin, creating a dependency on identifying affected serials per that bulletin (Applicability)."],"plain_english_summary":"What this directive does (mechanically)\n\n- It requires inspection of the electrical harnesses near the Branson fuel tank and modification by installing a barrier between the forward Branson tank and the electrical harnesses (Background).  \n- Compliance must follow the procedures set out in two Canadair Challenger Alert Service Bulletins: A600-0250 and A600-0268 (Documents).  \n- The work must be completed before the aircraft is issued an Australian Certificate of Airworthiness (Compliance).\n\nWho this affects\n\n- Owners/operators of Bombardier (Canadair) CL-600 (Challenger) aeroplanes listed in Canadair Alert SB A600-0250 (Applicability).  \n- Maintenance organisations or technicians who perform the inspections and modifications called for by the service bulletins (Documents).\n\nWhy it matters (stated purpose and operational consequences)\n\n- The stated purpose is to ensure there is adequate clearance between electrical harnesses and the Branson tank and to install a barrier between the forward Branson tank and electrical harnesses (Background). That is the explicit safety objective the directive directs operators to achieve.  \n\nCosts, incentives and trade-offs (how this changes behaviour and who pays)\n\n- Who pays: aircraft owners/operators must fund the inspection and any modification work (Compliance; Documents).  \n- When it must be done: the work is mandatory before an Australian Certificate of Airworthiness can be issued for an affected aeroplane (Compliance). This creates a direct incentive for operators to complete the work to obtain certification.  \n- Opportunity cost: the aircraft may be delayed from entering service or returned-to-service until the inspection/modification is completed (Compliance).  \n\nImplementation, compliance burden and discretion\n\n- Implementation follows manufacturer service bulletins (A600-0250 and A600-0268) (Documents), so the directive delegates technical detail to those documents.  \n- Compliance burden is operational and technical: inspecting harness routing/clearance and installing a physical barrier if required. The directive itself does not list the step-by-step procedures—those are in the referenced service bulletins (Documents).  \n- Enforcement/decision: the requirement is administered through the airworthiness certification process (Compliance). The regulator requires evidence of compliance before issuing the certificate.  \n\nMarket and operational effects (concrete mechanisms, not value judgments)\n\n- Maintenance demand: operators will need qualified maintenance resources and possibly replacement parts to meet the SB instructions, which increases demand for such services (Documents).  \n- No change to ownership, operating rights or contracts is specified in the directive itself; it imposes a pre-certification technical requirement on listed aeroplanes (Applicability; Compliance).  \n\nRisks, limits and uncertainty\n\n- The directive relies on the correctness and completeness of the referenced service bulletins for technical detail (Documents). If the bulletins are ambiguous or impractical, that creates implementation risk for operators and maintenance providers.  \n- The text does not specify any exemptions, alternative procedures, or timelines other than the pre-certification requirement, so operators must follow the SBs or seek regulatory relief through established channels (Compliance; Documents)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific technical issue (electrical harness clearance near fuel tanks). The scope remains tightly focused on the original safety concern without expansion into unrelated areas."},"complexity_factors":["Very short document (approximately 200 words)","Only 2 defined compliance requirements (inspection and barrier installation)","No nested conditional logic or exceptions","Simple applicability test (aircraft listed in single referenced document)","Single compliance deadline (before Certificate of Airworthiness issuance)","References only 2 external technical documents (manufacturer service bulletins)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) for specific Bombardier Challenger 600 series aircraft.\n\n**What it does:**\n- Requires aircraft operators to inspect and modify the electrical wiring (harnesses) near the \"Branson fuel tank\" — a fuel tank located in the rear fuselage of these aircraft.\n- Mandates two specific actions:\n  1. Check that electrical wires have enough clearance from the fuel tank\n  2. Install a physical barrier between the forward part of the Branson tank and the electrical wiring\n\n**Who it affects:**\n- Owners and operators of Bombardier (Canadair) CL-600 series Challenger aircraft listed in the manufacturer's Alert Service Bulletin A600-0250\n- Anyone seeking to obtain an Australian Certificate of Airworthiness for these aircraft\n\n**Why it matters:**\n- Prevents potential electrical arcing or sparks near fuel tanks, which could cause fires or explosions\n- Addresses a safety risk identified by the manufacturer through their Alert Service Bulletins\n- Must be completed **before** an Australian Certificate of Airworthiness is issued — meaning aircraft cannot be legally flown in Australia without this fix\n\n**Key documents referenced:**\n- Canadair Alert Service Bulletin A600-0250 (identifies affected aircraft)\n- Canadair Alert Service Bulletin A600-0268 (likely contains the modification instructions)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-6-branson-fuel-tank-electrical-harness-inspection-and-modification","history":"/api/acts/ad-cl-600-6-branson-fuel-tank-electrical-harness-inspection-and-modification/history","analysis":"/api/acts/ad-cl-600-6-branson-fuel-tank-electrical-harness-inspection-and-modification/analysis","conflicts":"/api/acts/ad-cl-600-6-branson-fuel-tank-electrical-harness-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-cl-600-6-branson-fuel-tank-electrical-harness-inspection-and-modification/important-cases","documents":"/api/acts/ad-cl-600-6-branson-fuel-tank-electrical-harness-inspection-and-modification/documents"}}