{"id":"F2006B02105","name":"AD/AC/46 - Separation of Electrical Wiring from Fuel Line","slug":"ad-ac-46-separation-of-electrical-wiring-from-fuel-line","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41335,"registerId":"commonwealth-F2006B02105-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/46 - Separation of Electrical Wiring from Fuel Line","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 12/1971,Aircraft below 5700 kg,Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes,Separation of Electrical Wiring from Fuel Line,46\ntitle: Airworthiness Directive - AD/AC/46 - Separation of Electrical Wiring from Fuel Line\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)  Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes\n\n \n\nAD/AC/46 Separation of Electrical Wiring from Fuel Line 12/71\n\nApplicability: Models 500B, 500U and 500S with S/Nos. 893 to 3115. Document:  Aero Commander SL No. 240.\n\nCompliance: Within 200 hours’ time in service after 31 December 1971.\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":1425},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow, technical scope focused solely on the wiring separation requirement for specific aircraft models. There is no evidence of scope expansion beyond the original safety intent."},"complexity_factors":["Extremely brief text (under 100 words)","No defined terms or interpretation section","Single, unambiguous applicability criterion (specific aircraft models and serial number range)","One compliance requirement with clear deadline and reference document","No cross-references to other legislative provisions","No exceptions, exemptions, or conditional logic"],"plain_english_summary":"**What this does:** This Airworthiness Directive (a mandatory safety rule issued by the aviation regulator) requires specific Twin Commander aircraft to physically separate electrical wiring from fuel lines to prevent fires and explosions.\n\n**Who it affects:** Owners and operators of Twin Commander (also known as Gulfstream/Rockwell/Aero Commander) models 500B, 500U and 500S with serial numbers between 893 and 3115.\n\n**What must be done:** The aircraft must be modified to ensure electrical wiring is kept away from fuel lines, following the manufacturer's Service Letter No. 240. This work must be completed within 200 hours of flight time after 31 December 1971.\n\n**Why it matters:** Electrical sparks near fuel lines create a severe fire risk. This rule mandates a physical barrier or distance between potential ignition sources (electrical wiring) and flammable fuel systems to prevent catastrophic accidents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-46-separation-of-electrical-wiring-from-fuel-line","history":"/api/acts/ad-ac-46-separation-of-electrical-wiring-from-fuel-line/history","analysis":"/api/acts/ad-ac-46-separation-of-electrical-wiring-from-fuel-line/analysis","conflicts":"/api/acts/ad-ac-46-separation-of-electrical-wiring-from-fuel-line/conflicts","importantCases":"/api/acts/ad-ac-46-separation-of-electrical-wiring-from-fuel-line/important-cases","documents":"/api/acts/ad-ac-46-separation-of-electrical-wiring-from-fuel-line/documents"}}