{"id":"F2006B10476","name":"AD/HS 125/37 - Rudder Torque Tube - Inspection and Modification","slug":"ad-hs-125-37-rudder-torque-tube-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116215,"registerId":"commonwealth-F2006B10476-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HS 125/37 - Rudder Torque Tube - Inspection and 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)  British Aerospace BAe 125 Series Aeroplanes\n\n \n\nAD/HS 125/37 Rudder Torque Tube - Inspection and Modification\n\n\n9/74\n\n \n\nThis AD contents has been removed from the listing because the aircraft model is not currently on the register.\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\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The supplied text states: \"This AD contents has been removed from the listing because the aircraft model is not currently on the register.\" As recorded, that removal reduces the AD's presence in the public listing for registered aircraft (source). The AD's original scope (inspection and modification of the rudder torque tube on BAe 125 series aeroplanes, per the title) is no longer represented in the listing because the model is not on the register (source). The document provided does not state whether the AD was revoked, superseded, or retained for historical record-keeping."},"complexity_factors":["Very limited source text: only title, header, date marker (\"9/74\"), and a removal note are present.","Absence of operative detail: no inspection procedures, modification instructions, compliance times, or obligations are included.","Regulatory context given only by header (Civil Aviation Regulations Part 39) but no cross-references or section citations to procedural rules.","Unclear current applicability: removal-from-listing statement exists but the document does not state whether the AD was formally revoked or superseded.","Historical formatting and metadata clutter (meta tags, image placeholder) that do not add substantive legal content."],"plain_english_summary":"This airworthiness directive (AD/HS 125/37, dated 9/74) addressed inspection and modification of the rudder torque tube on British Aerospace BAe 125 series aeroplanes, so would have affected owners/operators of that type. The supplied extract contains no technical or compliance details and shows the AD entry was removed from the listing because the aircraft model is not currently on the register."},"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"Not applicable — this is a withdrawn directive with no current operative scope."},"complexity_factors":["Document is essentially a placeholder or tombstone entry indicating removal from the register","No operative provisions, defined terms, or conditional logic present","Single sentence of substantive content explaining the removal","No cross-references to other legislation or technical standards","Extremely short — approximately 50 words of meaningful text"],"plain_english_summary":"This document is an **Airworthiness Directive (AD)** — a mandatory safety notice issued by the Civil Aviation Safety Authority (CASA) that requires owners or operators of specific aircraft to take certain actions to keep their planes airworthy.\n\n**What it covers:**\n- **Aircraft type:** British Aerospace BAe 125 series aeroplanes (business jets)\n- **Issue:** Rudder torque tube — a component that helps control the aircraft's rudder (the vertical part of the tail that steers the plane left and right)\n- **Required actions:** Inspection and modification of this part\n\n**Current status:**\nThis directive has been **removed from active listings** because the specific aircraft model is no longer registered in Australia. This means there are no BAe 125 series planes currently on the Australian civil aircraft register, so the safety requirement no longer needs to be actively enforced here.\n\n**Why it matters:**\nAirworthiness Directives are critical safety tools. They typically issue when a manufacturer or regulator discovers a defect, wear pattern, or design flaw that could affect flight safety. Even though this particular AD is no longer active, it illustrates how aviation safety works — regulators track aircraft fleets and mandate fixes before problems cause accidents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-37-rudder-torque-tube-inspection-and-modification","history":"/api/acts/ad-hs-125-37-rudder-torque-tube-inspection-and-modification/history","analysis":"/api/acts/ad-hs-125-37-rudder-torque-tube-inspection-and-modification/analysis","conflicts":"/api/acts/ad-hs-125-37-rudder-torque-tube-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-hs-125-37-rudder-torque-tube-inspection-and-modification/important-cases","documents":"/api/acts/ad-hs-125-37-rudder-torque-tube-inspection-and-modification/documents"}}