{"id":"F2006B11045","name":"AD/L.40/4 - Elevator and Rudder Control System - Modification","slug":"ad-l-40-4-elevator-and-rudder-control-system-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56663,"registerId":"commonwealth-F2006B11045-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/L.40/4 - Elevator and Rudder Control System - 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)  Meta Sokol L.40 Series Aeroplanes\n\n \n\nAD/L.40/4 Elevator and Rudder Control System - Modification 2/64\n\nApplicability: All models.\n\n \n\nRequirement: 1. All unduplicated single-strand wires in elevator and rudder control system shall be replaced with approved flexible cables to an approved scheme.\n\n \n\n2.    The replacement cables shall be not less than 0.12-in diameter and shall have a minimum strength of 10 cwt.\n\n \n\n3.    The stiffness of the modified control systems shall be such as to ensure satisfactory flight characteristics.\n\n \n\n4.    The rudder and elevator control cable systems shall be rigged to a tension not less than 35 or more than 45 pounds.\n\n \n\nCompliance: Before 1 September 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\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1841},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"Retains original narrow scope targeting specific mechanical modifications to elevator and rudder control systems only. No expansion into broader operational, training, or maintenance protocol requirements."},"complexity_factors":["Four discrete, clearly numbered technical requirements with no sub-paragraphs","Single aircraft type applicability (Meta Sokol L.40 series)","No defined terms, interpretation sections, or cross-references to other legislation","Measurable, objective standards (0.12-in diameter, 10 cwt strength, 35-45 lbs tension)"],"plain_english_summary":"This mandatory airworthiness directive orders owners and operators of Meta Sokol L.40 aircraft to upgrade the elevator and rudder control systems by replacing lone single‑strand control wires with approved flexible cables meeting specified strength, thickness, stiffness, and tension requirements. It affects pilots, owners, and maintenance engineers and matters because stronger, properly tensioned cables prevent wire failure that could cause loss of control in flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-l-40-4-elevator-and-rudder-control-system-modification","history":"/api/acts/ad-l-40-4-elevator-and-rudder-control-system-modification/history","analysis":"/api/acts/ad-l-40-4-elevator-and-rudder-control-system-modification/analysis","conflicts":"/api/acts/ad-l-40-4-elevator-and-rudder-control-system-modification/conflicts","importantCases":"/api/acts/ad-l-40-4-elevator-and-rudder-control-system-modification/important-cases","documents":"/api/acts/ad-l-40-4-elevator-and-rudder-control-system-modification/documents"}}