{"id":"F2006B07164","name":"AD/SWSA226/18 - Stabiliser Trim Disconnect Controls - Modification","slug":"ad-swsa226-18-stabiliser-trim-disconnect-controls-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49046,"registerId":"commonwealth-F2006B07164-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SWSA226/18 - Stabiliser Trim Disconnect Controls - 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)  Fairchild (Swearingen) SA226 and SA227 Series Aeroplanes\n\n \n\nAD/SWSA226/18 Stabiliser Trim Disconnect Controls - Modification\n\nApplicability: All models fitted with an automatic pilot.\n\n \n\nDocument: Swearingen Alert SB A22-10-2059, -3063 or -4062 and supplement 1. Compliance:  Within 100 hours time in service after 30 August 1974.\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\n\n8/74\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1741},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow technical scope targeting a specific mechanical modification for defined aircraft models."},"complexity_factors":["No interpretation section or defined terms","Single, clear applicability criterion (autopilot fitted)","Straightforward compliance requirement (100 hours after fixed date)","No exceptions, provisos, or conditional logic"],"plain_english_summary":"**What this directive does**\n\nThis Airworthiness Directive requires owners and operators of specific Fairchild (Swearingen) aircraft to modify the **stabiliser trim disconnect controls** — the mechanism that lets pilots manually disconnect automatic trim adjustments during flight.\n\n**Who it affects**\n\nAll models of the Fairchild (Swearingen) SA226 and SA227 series aeroplanes that are fitted with an automatic pilot (autopilot).\n\n**What must be done**\n\nOperators must carry out the modifications described in Swearingen Alert Service Bulletin A22-10-2059, -3063 or -4062 (plus Supplement 1). These documents detail the specific technical changes needed to the aircraft's trim disconnect system.\n\n**Compliance deadline**\n\nThe work must be completed within **100 hours of flight time** after 30 August 1974.\n\n**Why it matters**\n\nThis is a mandatory safety modification issued under aviation regulations to address potential issues with the autopilot trim disconnect functionality, ensuring pilots can retain manual control if the automatic system malfunctions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-swsa226-18-stabiliser-trim-disconnect-controls-modification","history":"/api/acts/ad-swsa226-18-stabiliser-trim-disconnect-controls-modification/history","analysis":"/api/acts/ad-swsa226-18-stabiliser-trim-disconnect-controls-modification/analysis","conflicts":"/api/acts/ad-swsa226-18-stabiliser-trim-disconnect-controls-modification/conflicts","importantCases":"/api/acts/ad-swsa226-18-stabiliser-trim-disconnect-controls-modification/important-cases","documents":"/api/acts/ad-swsa226-18-stabiliser-trim-disconnect-controls-modification/documents"}}