{"id":"F2006B02093","name":"AD/AC/35 - Rudder Torque Tube - Modification","slug":"ad-ac-35-rudder-torque-tube-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41323,"registerId":"commonwealth-F2006B02093-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/35 - Rudder Torque Tube - Modification","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 12/1967,Aircraft below 5700 kg,Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes,Rudder Torque Tube - Modification,35\ntitle: Airworthiness Directive - AD/AC/35 - Rudder Torque Tube - Modification\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/35 Rudder Torque Tube - Modification 12/67\n\nApplicability: All models with S/Nos. 2 to 1727. Document:  Aero Commander SL No. 203.\n\nCompliance: Within 100 hours’ time in service after 7 September 1967.\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":1414},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is the original 1967 directive (Issue 12/67). The scope remains tightly focused on the specific rudder modification for the identified aircraft serial numbers, with no subsequent expansion into other systems or aircraft types."},"complexity_factors":["Single compliance action with no alternatives","No definitions section or technical jargon requiring explanation","No cross-references to other legislation or regulations","No conditional exceptions (if/then scenarios)","Substantive content fits in three sentences"],"plain_english_summary":"**What this is:** A safety order (Airworthiness Directive) mandating a mechanical fix to prevent your aircraft's rudder from potentially failing.\n\n**Who it affects:** Owners and operators of Twin Commander aeroplanes (Gulfstream/Rockwell/Aero Commander 500, 600 and 700 series) with serial numbers 2 through 1727.\n\n**What you must do:** Modify the **rudder torque tube** — the metal shaft that carries your foot-pedal movements to the rudder — strictly following Aero Commander Service Letter No. 203.\n\n**Deadline:** Within 100 hours of flying time after 7 September 1967.\n\n**Why it matters:** A faulty torque tube could jam or break, leaving you unable to steer the aircraft. This directive ensures the control system remains airworthy."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-35-rudder-torque-tube-modification","history":"/api/acts/ad-ac-35-rudder-torque-tube-modification/history","analysis":"/api/acts/ad-ac-35-rudder-torque-tube-modification/analysis","conflicts":"/api/acts/ad-ac-35-rudder-torque-tube-modification/conflicts","importantCases":"/api/acts/ad-ac-35-rudder-torque-tube-modification/important-cases","documents":"/api/acts/ad-ac-35-rudder-torque-tube-modification/documents"}}