{"id":"F2006B02350","name":"AD/AMD 20/12 - Horizontal Stabiliser Trim Control Switch Connections","slug":"ad-amd-20-12-horizontal-stabiliser-trim-control-switch-connections","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41580,"registerId":"commonwealth-F2006B02350-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AMD 20/12 - Horizontal Stabiliser Trim Control Switch Connections","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)  AMD Fan Jet Falcon (Falcon 20/Mystere-Falcon 200) Series Aeroplanes\n\n \n\nAD/AMD 20/12 Horizontal Stabiliser Trim Control\n\nSwitch Connections\n\n\n4/77\n\n \n\nApplicability: All models fitted with an automatic pilot or any optional circuit that connects to horizontal trim control switch normally closed contacts.\n\nRequirement: Action in accordance with AMD SB 568, Rev. 2 (27-74).\n\nNote: Bureau Veritas 76-219-13 (B) refers.\n\nCompliance: Within 200 hours time in service after 30 April 1977.\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":1711},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive remains precisely targeted at its original narrow technical purpose: correcting trim control switch wiring in specific Falcon 20 aircraft configurations. There is no evidence of scope expansion beyond the original safety concern regarding autopilot and optional circuit connections."},"complexity_factors":["Single-sentence applicability clause with one technical condition","Single requirement referencing an external service bulletin","No defined terms or interpretation section","No exceptions, exemptions, or conditional logic","Operative text is fewer than 50 words"],"plain_english_summary":"This safety rule requires operators of specific Falcon 20 business jets to correct a wiring issue with the aircraft's pitch control system.\n\n**Who it affects**\nOwners and operators of AMD Fan Jet Falcon 20 series aircraft that are equipped with an automatic pilot (autopilot) or optional circuits connecting to the horizontal trim control switch wiring.\n\n**What it requires**\nOperators must carry out technical actions in accordance with **AMD Service Bulletin 568, Revision 2** to ensure the horizontal stabiliser trim control switch connections are properly configured. This specifically addresses electrical circuits connected to the \"normally closed\" contacts of the trim switches — the wiring that should be complete when the trim button is not being pressed.\n\n**Why it matters**\nFaulty connections in the trim control system could cause unexpected trim movement or autopilot malfunctions, potentially compromising the aircraft's controllability and flight safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-amd-20-12-horizontal-stabiliser-trim-control-switch-connections","history":"/api/acts/ad-amd-20-12-horizontal-stabiliser-trim-control-switch-connections/history","analysis":"/api/acts/ad-amd-20-12-horizontal-stabiliser-trim-control-switch-connections/analysis","conflicts":"/api/acts/ad-amd-20-12-horizontal-stabiliser-trim-control-switch-connections/conflicts","importantCases":"/api/acts/ad-amd-20-12-horizontal-stabiliser-trim-control-switch-connections/important-cases","documents":"/api/acts/ad-amd-20-12-horizontal-stabiliser-trim-control-switch-connections/documents"}}