{"id":"F2006B02114","name":"AD/AC/54 - Aileron Trim Tab - Inspection and Repair","slug":"ad-ac-54-aileron-trim-tab-inspection-and-repair","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41344,"registerId":"commonwealth-F2006B02114-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/54 - Aileron Trim Tab - Inspection and Repair","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 11/1973,Aircraft below 5700 kg,Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes,Aileron Trim Tab - Inspection and Repair,54\ntitle: Airworthiness Directive - AD/AC/54 - Aileron Trim Tab - Inspection and Repair\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/54 Aileron Trim Tab - Inspection and Repair 11/73\n\nApplicability: All models 690 and 690A with S/Nos. 11001 to 11127. All model 685 with S/Nos.\n\n12002, 12003, 12009, 12011, 12018, 12019, 12021 and 12031.\n\n \n\nDocument: Aero Commander SB No. 127.\n\n \n\nCompliance: Within 100 hours’ time in service after 30 November 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\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1082},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow technical scope addressing a specific safety defect in aileron trim tabs on defined Twin Commander aircraft models."},"complexity_factors":["Narrow applicability limited to specific aircraft models and serial number ranges","Single straightforward compliance action with clear deadline","Only one external reference document (Service Bulletin No. 127)","No conditional logic, exceptions, or nested requirements"],"plain_english_summary":"**What this does:** This safety directive requires owners of specific Twin Commander aircraft to inspect and repair the aileron trim tab — a small adjustable surface on the wing that helps keep the plane flying level without the pilot constantly holding the controls.\n\n**Who it affects:** Owners of specific models only:\n- **Model 690 and 690A** with serial numbers 11001 to 11127\n- **Model 685** with serial numbers 12002, 12003, 12009, 12011, 12018, 12019, 12021, and 12031\n\n**What you must do:** Follow the technical instructions in **Aero Commander Service Bulletin No. 127** and complete the inspection and repair within **100 flight hours** after 30 November 1973."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-54-aileron-trim-tab-inspection-and-repair","history":"/api/acts/ad-ac-54-aileron-trim-tab-inspection-and-repair/history","analysis":"/api/acts/ad-ac-54-aileron-trim-tab-inspection-and-repair/analysis","conflicts":"/api/acts/ad-ac-54-aileron-trim-tab-inspection-and-repair/conflicts","importantCases":"/api/acts/ad-ac-54-aileron-trim-tab-inspection-and-repair/important-cases","documents":"/api/acts/ad-ac-54-aileron-trim-tab-inspection-and-repair/documents"}}