{"id":"F2006B03835","name":"AD/BEECH 35/37 - Fuel and Hydraulic Lines in Engine Compartment","slug":"ad-beech-35-37-fuel-and-hydraulic-lines-in-engine-compartment","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43442,"registerId":"commonwealth-F2006B03835-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 35/37 - Fuel and Hydraulic Lines in Engine Compartment","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)  Beechcraft 35 (Bonanza) Series Aeroplanes\n\n \n\n# AD/BEECH 35/37 Fuel and Hydraulic Lines in Engine Compartment\n\nApplicability: All models fitted with turbochargers.\n\n# 11/72\n\n \n\nRequirement: Replace the aluminium alloy fuel and hydraulic lines on the engine side of the firewall, with approved fire resistant lines or hose assemblies in compliance with ANO 101.22, paragraph 6.25.1 or relocate the lines behind the firewall.\n\n \n\nCompliance: Within 200 hours time in service after 30 November 1972.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1458},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow scope targeting a specific fire-safety hazard on specific aircraft models. There is no evidence of scope expansion beyond the original safety intent to prevent engine compartment fires on turbocharged Beechcraft 35 series aircraft."},"complexity_factors":["Single, unambiguous applicability criterion (turbocharged Beechcraft 35 series only)","Binary compliance path (replace with fire-resistant lines OR relocate behind firewall)","No nested exceptions or conditional sub-clauses","Single technical cross-reference to ANO 101.22, paragraph 6.25.1","Precise, measurable compliance deadline (200 hours time in service after fixed date)"],"plain_english_summary":"Owners and operators of turbocharged Beechcraft Bonanza 35s must eliminate aluminium fuel and hydraulic lines in the engine compartment by either installing ANO 101.22–compliant fire‑resistant lines/hose assemblies or relocating those lines behind the firewall. This reduces the risk that molten lines during an engine fire will spray fuel or fail hydraulics, giving pilots more time to respond. The modification was required within 200 flight hours after 30 November 1972."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-35-37-fuel-and-hydraulic-lines-in-engine-compartment","history":"/api/acts/ad-beech-35-37-fuel-and-hydraulic-lines-in-engine-compartment/history","analysis":"/api/acts/ad-beech-35-37-fuel-and-hydraulic-lines-in-engine-compartment/analysis","conflicts":"/api/acts/ad-beech-35-37-fuel-and-hydraulic-lines-in-engine-compartment/conflicts","importantCases":"/api/acts/ad-beech-35-37-fuel-and-hydraulic-lines-in-engine-compartment/important-cases","documents":"/api/acts/ad-beech-35-37-fuel-and-hydraulic-lines-in-engine-compartment/documents"}}