{"id":"F2006B09444","name":"AD/ELECT/7 - Magneto - BTH Gear - Modification","slug":"ad-elect-7-magneto-bth-gear-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53874,"registerId":"commonwealth-F2006B09444-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ELECT/7 - Magneto - BTH Gear - 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 - 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Electrical Equipment\n\n \n\nAD/ELECT/7 Magneto - BTH Gear - Modification NK\n\nApplicability: BTH type AG4 and SG4. Document:  1. BTH Mod. CM 419; or\n\n2. ANO 107.2.16.3.4.\n\n \n\nCompliance: Before installation in an aircraft.\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":1528},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This maintains the narrow, technical scope typical of Airworthiness Directives—focused solely on a specific magneto modification requirement without expansion into broader operational or administrative matters."},"complexity_factors":["Extremely brief directive with only one substantive requirement","No defined terms or interpretation section","No conditional logic, exceptions, or nested provisions","Applicability limited to two specific equipment models (AG4 and SG4)","Single compliance trigger (before installation)"],"plain_english_summary":"This is a **safety directive** issued by the Civil Aviation Safety Authority (CASA) that acts as a mandatory recall for specific aircraft engine parts—**BTH type AG4 and SG4 magnetos** (ignition components used in aircraft engines).\n\n**What it requires:**\n* **Who it affects**: Aircraft maintenance engineers, operators, or anyone handling these specific magneto models.\n* **The rule**: You cannot legally install one of these magnetos in an aircraft unless it has first been modified according to specific technical documents (BTH Modification CM 419 or Airworthiness Notice 107.2.16.3.4).\n* **Timing**: The modification must be done **before installation**—there is no grace period to fix it later.\n\nThink of it like a compulsory safety upgrade for a car part, but for aeroplanes. It ensures these ignition components meet current airworthiness standards before they enter service."}},"importantCases":[],"_links":{"self":"/api/acts/ad-elect-7-magneto-bth-gear-modification","history":"/api/acts/ad-elect-7-magneto-bth-gear-modification/history","analysis":"/api/acts/ad-elect-7-magneto-bth-gear-modification/analysis","conflicts":"/api/acts/ad-elect-7-magneto-bth-gear-modification/conflicts","importantCases":"/api/acts/ad-elect-7-magneto-bth-gear-modification/important-cases","documents":"/api/acts/ad-elect-7-magneto-bth-gear-modification/documents"}}