{"id":"F2006B08574","name":"AD/CL-600/14 - Engine Pylon Fuel Feed Tube Assembly - Modification","slug":"ad-cl-600-14-engine-pylon-fuel-feed-tube-assembly-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51413,"registerId":"commonwealth-F2006B08574-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CL-600/14 - Engine Pylon Fuel Feed Tube Assembly - 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-600/14 Engine Pylon Fuel Feed Tube Assembly - Modification\n\nApplicability: All models S/Nos. 1004 to 1083.\n\n \n\nDocument: Canadair Challenger Alert SB No. A600-0352.\n\n \n\nCompliance: Prior to the issue of an Australian Certificate of Airworthiness.\n\n# 7/83\n\n \n\nBackground: The manufacturer requires replacement and positive locking of the bolts securing the engine fuel feed tube assembly to the fuel shut-off valve.\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","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1362},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow scope targeting a specific mechanical defect in specific aircraft serial numbers. There is no evidence of expansion beyond the original safety purpose."},"complexity_factors":["Single, specific mechanical action required","No defined terms or interpretation section","No cross-references to other legislative provisions","Applicability limited to specific aircraft serial number range only","Binary compliance requirement (must be done before certification)"],"plain_english_summary":"**What this does:** This is a safety directive requiring owners or operators of specific Bombardier Challenger aircraft to modify the engine fuel system before the aircraft can be certified as airworthy in Australia.\n\n**Who it affects:** Owners and operators of Bombardier (Canadair) CL-600 series aircraft with serial numbers 1004 to 1083.\n\n**What must be done:** The bolts holding the engine fuel feed tube (the pipe carrying fuel to the engine) to the fuel shut-off valve must be replaced and fitted with positive locking (a mechanical lock to prevent bolts from coming loose).\n\n**When:** This modification must be completed **before** the Civil Aviation Safety Authority (CASA) issues an Australian Certificate of Airworthiness for the aircraft.\n\n**Why it matters:** This prevents fuel leaks caused by loose bolts, which could lead to engine failure or fire."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-14-engine-pylon-fuel-feed-tube-assembly-modification","history":"/api/acts/ad-cl-600-14-engine-pylon-fuel-feed-tube-assembly-modification/history","analysis":"/api/acts/ad-cl-600-14-engine-pylon-fuel-feed-tube-assembly-modification/analysis","conflicts":"/api/acts/ad-cl-600-14-engine-pylon-fuel-feed-tube-assembly-modification/conflicts","importantCases":"/api/acts/ad-cl-600-14-engine-pylon-fuel-feed-tube-assembly-modification/important-cases","documents":"/api/acts/ad-cl-600-14-engine-pylon-fuel-feed-tube-assembly-modification/documents"}}