{"id":"F2006B11065","name":"AD/LA-4/15 - Auxiliary Fuel System - Placard","slug":"ad-la-4-15-auxiliary-fuel-system-placard","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56698,"registerId":"commonwealth-F2006B11065-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/LA-4/15 - Auxiliary Fuel System - Placard","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-4/15 Auxiliary Fuel System - Placard 1/76\n\nApplicability: All models LA-4 and LA-4-200 fitted with auxiliary fuel tanks to Supplemental Type Certificate No. SA 876EA.\n\n \n\nRequirement: 1. Install a placard adjacent to the auxiliary tank fuel transfer switches as follows:\n\n \n\nWARNING\n\n \n\nAUXILIARY TANK FUEL TRANSFER PROHIBITED UNLESS AUXILIARY TANK SUMPS ARE DRAINED FREE OF WATER AFTER EACH WATER OPERATION\n\n \n\nor\n\n \n\n2. FAA AD 76-02-01, Amendment 39-2494.\n\n \n\nCompliance: Before 16 April 1976.\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, single-issue airworthiness directive from 1976 addressing a specific safety hazard (water contamination in auxiliary fuel tanks of amphibious aircraft). It has not expanded beyond its original narrow scope."},"complexity_factors":["Single, specific aircraft type and modification (LA-4/LA-4-200 with STC SA 876EA auxiliary tanks)","Only two compliance options: install specific placard text OR reference to equivalent FAA AD","No defined terms section, no cross-references to other legislation beyond optional FAA alternative","Simple, unconditional requirement with fixed deadline","Total length: approximately 150 words"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) issued by Australia's Civil Aviation Safety Authority for specific **Consolidated Aeronautics LA-4 seaplanes** (also known as Lake Amphibians).\n\n**What it does:**\n- Requires owners of LA-4 and LA-4-200 aircraft fitted with extra fuel tanks to install a **warning placard** (a visible safety sign) next to the fuel transfer switches.\n\n**What the warning must say:**\n> \"AUXILIARY TANK FUEL TRANSFER PROHIBITED UNLESS AUXILIARY TANK SUMPS ARE DRAINED FREE OF WATER AFTER EACH WATER OPERATION\"\n\n**Why this matters:**\n- These are **amphibious aircraft** (they land on water and land). When operating on water, fuel tanks can collect water contamination.\n- Transferring fuel contaminated with water into the main tanks could cause **engine failure** — a serious safety risk.\n- The placard reminds pilots to drain water from the auxiliary tank \"sumps\" (the lowest points where water collects) before transferring fuel.\n\n**Alternative compliance:**\n- Owners can instead follow an equivalent American FAA directive (AD 76-02-01).\n\n**Who must comply:**\n- All Australian operators of affected LA-4 aircraft with auxiliary tanks approved under Supplemental Type Certificate SA 876EA.\n\n**Deadline:**\n- Before 16 April 1976 (this is a historical directive from 1976)."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive's scope is limited to aircraft models and equipment identified in the Applicability clause (LA-4 and LA-4-200 fitted with auxiliary tanks under STC No. SA 876EA) and to a single compliance action (installation of a specific placard) with an alternative of complying with the named FAA AD. There is no textual indication in the instrument that it expands or narrows scope beyond those explicit limits."},"complexity_factors":["Single, specific mandatory action: installation of a placard adjacent to the auxiliary tank fuel transfer switches (Requirement).","Narrow applicability limited to LA-4 and LA-4-200 aircraft fitted with auxiliary tanks under STC No. SA 876EA (Applicability).","Simple, unambiguous placard text specified verbatim (Requirement).","Provides an explicit alternative compliance route via a specific FAA AD (Requirement), introducing a small choice for operators.","Short, fixed compliance deadline (16 April 1976) but no ongoing regulatory reporting obligations stated (Compliance)."],"plain_english_summary":"This AD requires owners/operators of Consolidated LA-4 and LA-4-200 aeroplanes fitted with auxiliary tanks under STC SA 876EA to install a specified warning placard next to the auxiliary tank fuel transfer switches, stating fuel transfer is prohibited unless tank sumps are drained of water after each water operation. Compliance is required by 16 April 1976; meeting FAA AD 76-02-01 is an accepted alternative. It chiefly affects operators and maintenance staff and imposes a low, primarily procedural cost."}},"importantCases":[],"_links":{"self":"/api/acts/ad-la-4-15-auxiliary-fuel-system-placard","history":"/api/acts/ad-la-4-15-auxiliary-fuel-system-placard/history","analysis":"/api/acts/ad-la-4-15-auxiliary-fuel-system-placard/analysis","conflicts":"/api/acts/ad-la-4-15-auxiliary-fuel-system-placard/conflicts","importantCases":"/api/acts/ad-la-4-15-auxiliary-fuel-system-placard/important-cases","documents":"/api/acts/ad-la-4-15-auxiliary-fuel-system-placard/documents"}}