{"id":"F2006B11070","name":"AD/LA-4/2 - Fuel Line - Replacement","slug":"ad-la-4-2-fuel-line-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56705,"registerId":"commonwealth-F2006B11070-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/LA-4/2 - Fuel Line - 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)  Consolidated Aeronautics, Colonial and LA-4 Series Aeroplanes\n\n \n\nAD/LA-4/2 Fuel Line - Replacement 2/66\n\nApplicability: All Lake LA-4 Series.\n\n \n\nRequirement: Replace the two short fuel lines P/No. 2-6700-105 and 2-6700-109 between the engine fuel pump and the carburettor by approved fire resistant lines.\n\n \n\nCompliance: Before 16 February 1966.\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 \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1646},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow technical scope addressing fire safety for specific fuel lines in Lake LA-4 aircraft. No expansion of regulatory reach or substantive alteration of purpose is evident."},"complexity_factors":["Single, unambiguous operative requirement with no subsections or conditional branches","No defined terms, interpretation provisions, or cross-references to other instruments","Specific part numbers (2-6700-105 and 2-6700-109) provided, eliminating ambiguity about which components are affected","Single, absolute compliance date with no exceptions, extensions, or phased implementation","Narrow applicability limited to one specific aircraft series (Lake LA-4)"],"plain_english_summary":"This is a **mandatory safety order** (called an Airworthiness Directive) issued by the Civil Aviation Safety Authority for owners and operators of **Lake LA-4 series aircraft**.\n\n**What you must do:**\nReplace two specific fuel lines (part numbers 2-6700-105 and 2-6700-109) that connect the engine fuel pump to the carburettor. You must install approved **fire-resistant fuel lines** instead of the original equipment.\n\n**Why this matters:**\nStandard fuel lines can melt or rupture in an engine fire, feeding the flames with aviation fuel. Fire-resistant lines are designed to withstand heat, providing critical protection in the engine compartment and preventing catastrophic fires.\n\n**Compliance:**\nThe directive required this replacement to be completed before 16 February 1966. After that date, affected aircraft could not legally fly until the modification was made."}},"importantCases":[],"_links":{"self":"/api/acts/ad-la-4-2-fuel-line-replacement","history":"/api/acts/ad-la-4-2-fuel-line-replacement/history","analysis":"/api/acts/ad-la-4-2-fuel-line-replacement/analysis","conflicts":"/api/acts/ad-la-4-2-fuel-line-replacement/conflicts","importantCases":"/api/acts/ad-la-4-2-fuel-line-replacement/important-cases","documents":"/api/acts/ad-la-4-2-fuel-line-replacement/documents"}}