{"id":"F2006B03943","name":"AD/BEECH 50/2 - Cylinder Head Thermocouple","slug":"ad-beech-50-2-cylinder-head-thermocouple","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43552,"registerId":"commonwealth-F2006B03943-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 50/2 - Cylinder Head Thermocouple","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 50 (Twin Bonanza) Series Aeroplanes\n\n \n\nAD/BEECH 50/2 Cylinder Head Thermocouple NK\n\nApplicability: Models 50 and B50 with S/Nos. prior to CH-45. Requirement:  Action in accordance with Beechcraft SB 50, B50 - No. 3. Compliance:               Forthwith.\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":1704},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original precise scope as a targeted safety mandate for a specific aircraft component on defined models; no expansion of coverage or purpose has occurred."},"complexity_factors":["Single, straightforward technical mandate","Narrow applicability restricted to specific aircraft models and serial numbers","No defined terms, exceptions, or conditional logic within the instrument","Defers compliance details to an external technical document (Service Bulletin) rather than reproducing complex procedures"],"plain_english_summary":"This is a mandatory safety notice (an **Airworthiness Directive**) from the Civil Aviation Safety Authority for owners of specific Beechcraft aeroplanes.\n\n**Who it affects:**\nOwners and operators of **Beechcraft Model 50 and B50** aircraft (known as the 'Twin Bonanza') with serial numbers before CH-45.\n\n**What it requires:**\nYou must immediately take action to fix or inspect the **cylinder head thermocouple** — a temperature sensor that tells the pilot if the engine is overheating. Specifically, you must follow the technical instructions in **Beechcraft Service Bulletin No. 3** for these models.\n\n**When:**\nImmediately (the legal term used is 'forthwith', meaning without delay).\n\n**Why it matters:**\nIf this temperature sensor fails, pilots won't know if the engine is running too hot, which could lead to engine failure, damage, or fire. This rule ensures that critical safety equipment is working properly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-50-2-cylinder-head-thermocouple","history":"/api/acts/ad-beech-50-2-cylinder-head-thermocouple/history","analysis":"/api/acts/ad-beech-50-2-cylinder-head-thermocouple/analysis","conflicts":"/api/acts/ad-beech-50-2-cylinder-head-thermocouple/conflicts","importantCases":"/api/acts/ad-beech-50-2-cylinder-head-thermocouple/important-cases","documents":"/api/acts/ad-beech-50-2-cylinder-head-thermocouple/documents"}}