{"id":"F2006B02107","name":"AD/AC/48 - Rudder Control Balance - Inspection","slug":"ad-ac-48-rudder-control-balance-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41337,"registerId":"commonwealth-F2006B02107-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/48 - Rudder Control Balance - Inspection","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 2/1973,Aircraft below 5700 kg,Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes,Rudder Control Balance - Inspection,48\ntitle: Airworthiness Directive - AD/AC/48 - Rudder Control Balance - Inspection\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)  Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes\n\n \n\nAD/AC/48 Rudder Control Balance - Inspection 2/73\n\nApplicability: Model 500S with S/Nos. 3123 to 3137. Document:  Aero Commander SB No. 114.\n\nCompliance: Within 100 hours’ time in service after 28 February 1973.\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":1337},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This remains a narrow, targeted airworthiness directive issued in 1973. It addresses a specific technical inspection requirement for a limited fleet of aircraft and has not expanded beyond its original safety purpose."},"complexity_factors":["Single, specific compliance requirement","Limited applicability to only 15 specific aircraft serial numbers","No cross-references to other legislation or regulations","Short length with minimal defined terms","Simple deadline calculation based on flight hours"],"plain_english_summary":"**What this means for aircraft owners:**\n\nThis is a safety order requiring a specific mechanical inspection for certain Twin Commander airplanes.\n\n**Who must comply:**\n- Owners or operators of **Twin Commander Model 500S** aircraft with **serial numbers 3123 through 3137**\n- This covers the Gulfstream/Rockwell/Aero Commander 500, 600 and 700 series\n\n**What must be done:**\n- Inspect the **rudder control balance** (a component that helps pilots steer the aircraft smoothly) according to the manufacturer's Service Bulletin No. 114\n\n**When:**\n- Within **100 hours of flying time** after 28 February 1973\n\n**Why it matters:**\nThis directive addresses a potential safety defect in the rudder system that could affect aircraft control. Compliance ensures the mechanical balance of the rudder is properly checked to prevent flight control issues."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-48-rudder-control-balance-inspection","history":"/api/acts/ad-ac-48-rudder-control-balance-inspection/history","analysis":"/api/acts/ad-ac-48-rudder-control-balance-inspection/analysis","conflicts":"/api/acts/ad-ac-48-rudder-control-balance-inspection/conflicts","importantCases":"/api/acts/ad-ac-48-rudder-control-balance-inspection/important-cases","documents":"/api/acts/ad-ac-48-rudder-control-balance-inspection/documents"}}