{"id":"F2006B07181","name":"AD/SWSA226/41 - Flight Control, Control Column - Modification","slug":"ad-swsa226-41-flight-control-control-column-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114947,"registerId":"commonwealth-F2006B07181-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SWSA226/41 - Flight Control, Control Column - 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/SWSA226/41 Flight Control, Control Column - Modification 2/82\n\nApplicability: All model SA226-T S/N T201 to T290. All model SA226-AT S/N AT001 to AT066 and all model SA226-TC S/N TC201 to TC225.\n\n \n\nDocument: Swearingen SB27-022.\n\n \n\nNote: FAA AD 81-26-04 Amendment 39-4284 refers.\n\n \n\nCompliance: Within 300 hours time in service after 28 February, 1982.\n\n \n\nBackground: There has been a failure of the control column cable pulley system with subsequent loss of lateral control reported overseas.\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The supplied text sets a clear, narrow scope (specific models and serial numbers) and a single mandated modification with a fixed compliance window. The document does not include any information indicating a change from an earlier or different scope; no prior version or differing applicability is provided in the text, so there is no basis in the supplied material to conclude the scope has changed from any original intent. (Applicability, Compliance, Document)"},"complexity_factors":["Narrow applicability defined by specific serial-number ranges (easy to determine applicability but requires checking individual aircraft records) (Applicability)","Single mandatory action referenced to an external technical document (Swearingen SB27-022) which contains the procedural detail (Document)","Fixed compliance window measured in flight hours after a calendar date, requiring operators to track time-in-service accurately (Compliance)","Cross-reference to an FAA AD for related action (Note), adding an external point of reference for operators operating internationally","No procedural detail, exemptions, or alternative compliance methods included in the text, so operational clarity depends on the referenced service bulletin (Document)"],"plain_english_summary":"This AD mandates a modification to the flight control column cable pulley system on specified Fairchild (Swearingen) SA226/SA227 serial-numbered aircraft, to be done per Swearingen SB27-022. It was issued after a reported pulley failure causing loss of lateral control.\n\nAffected owners/operators must complete the work within 300 hours TIS after 28 Feb 1982, bear costs and downtime, and have no alternative compliance options in the text."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive focused on a specific mechanical defect in specific aircraft models. It has not expanded beyond its original purpose of mandating a safety modification to prevent control system failures."},"complexity_factors":["Very short document (approximately 150 words)","Only 3 defined applicability criteria (specific aircraft models and serial number ranges)","Single compliance requirement with clear deadline","No nested exceptions or conditional logic","Single cross-reference to FAA AD 81-26-04 (informational only)","No interpretation section or defined terms"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA).\n\n**What it does:** It requires owners and operators of specific Fairchild (Swearingen) aircraft models to modify the control column (the pilot's steering wheel-like device) within 300 hours of flying time after 28 February 1982.\n\n**Why it matters:** There had been overseas reports of the control column cable pulley system failing, which caused pilots to lose lateral control (the ability to steer left or right). This modification prevents that dangerous failure.\n\n**Who it affects:** Owners and operators of:\n- SA226-T aircraft (serial numbers T201 to T290)\n- SA226-AT aircraft (serial numbers AT001 to AT066)  \n- SA226-TC aircraft (serial numbers TC201 to TC225)\n\n**What must be done:** Follow the instructions in Swearingen Service Bulletin SB27-022 to modify the flight control system. This is mandatory — not optional."}},"importantCases":[],"_links":{"self":"/api/acts/ad-swsa226-41-flight-control-control-column-modification","history":"/api/acts/ad-swsa226-41-flight-control-control-column-modification/history","analysis":"/api/acts/ad-swsa226-41-flight-control-control-column-modification/analysis","conflicts":"/api/acts/ad-swsa226-41-flight-control-control-column-modification/conflicts","importantCases":"/api/acts/ad-swsa226-41-flight-control-control-column-modification/important-cases","documents":"/api/acts/ad-swsa226-41-flight-control-control-column-modification/documents"}}