{"id":"F2006B02085","name":"AD/AC/26 - Elevator Torque Tube - Inspection and Modification","slug":"ad-ac-26-elevator-torque-tube-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41315,"registerId":"commonwealth-F2006B02085-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/26 - Elevator Torque Tube - Inspection and 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 6/1962,Aircraft below 5700 kg,Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes,Elevator Torque Tube - Inspection and Modification,26\ntitle: Airworthiness Directive - AD/AC/26 - Elevator Torque Tube - Inspection and 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/26 Elevator Torque Tube - Inspection and Modification 6/62\n\nApplicability: All models with S/Nos. 1 to 1230. Document:  Aero Commander SL No. 124.\n\nCompliance: Forthwith.\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":2295},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This appears to be the original directive establishing the safety requirement, targeting only the specified elevator component on the identified aircraft models. There is no indication of scope creep or expansion beyond the initial safety mandate."},"complexity_factors":["Extremely brief text with no legal jargon","Single, unambiguous applicability criterion (specific aircraft models and serial number range)","No defined terms or interpretation section","No conditional logic or exceptions—compliance is immediate and unconditional","Technical requirements incorporated by reference to external service letter rather than set out in the text"],"plain_english_summary":"This AD requires immediate inspection and modification of the elevator torque tube on Twin Commander (Gulfstream/Rockwell/Aerocommander 500/600/700 series) aircraft, serial numbers 1–1230. Owners and operators must follow Aero Commander Service Letter No. 124 without delay.\n\nIt matters because a torque-tube failure can cause loss of elevator control and serious loss of aircraft pitch control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-26-elevator-torque-tube-inspection-and-modification","history":"/api/acts/ad-ac-26-elevator-torque-tube-inspection-and-modification/history","analysis":"/api/acts/ad-ac-26-elevator-torque-tube-inspection-and-modification/analysis","conflicts":"/api/acts/ad-ac-26-elevator-torque-tube-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-ac-26-elevator-torque-tube-inspection-and-modification/important-cases","documents":"/api/acts/ad-ac-26-elevator-torque-tube-inspection-and-modification/documents"}}