{"id":"F2006B10477","name":"AD/HS 125/38 - Elevator Trim Tabs - Inspection and Modification","slug":"ad-hs-125-38-elevator-trim-tabs-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116217,"registerId":"commonwealth-F2006B10477-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HS 125/38 - Elevator Trim Tabs - 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 125/38 Elevator Trim Tabs - Inspection and Modification 11/74\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\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The original scope of the AD — imposing inspection and modification obligations on BAe 125 series aeroplanes registered in Australia — is effectively not in force in practice because the model is not on the Australian register. The source records that the AD entry \"has been removed from the listing because the aircraft model is not currently on the register,\" so the directive does not currently impose obligations on any Australian‑registered aircraft. If the model were re‑registered, the AD would again be relevant unless otherwise amended or withdrawn."},"complexity_factors":["Document is very brief and limited to an AD title, aircraft model, date and removal statement.","No substantive technical or procedural detail about the required inspection or modification is provided in the source text.","Regulatory context is referenced (Civil Aviation Regulations 1998, Part 39), but the instrument does not set out staged compliance steps, timelines, or enforcement mechanics in the supplied text.","Operational impact is contingent on the presence of the aircraft model on the register; current absence simplifies practical effect."],"plain_english_summary":"AD/HS 125/38 requires inspection and modification of elevator trim tabs on British Aerospace BAe 125 series aeroplanes, imposing mandatory work and costs on registered owners/operators under Part 39. It has been removed from the Australian AD listing because no BAe 125s are currently on the register, so there is presently no active obligation in Australia."},"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The document has not expanded beyond its original scope; rather, it has been deliberately contracted to nil content because the subject aircraft type is no longer on the Australian register. This represents a narrowing, not an expansion, of scope."},"complexity_factors":["Document is a stub/placeholder with no operative legal text remaining","Only 2 substantive sentences of content","No defined terms, cross-references, or conditional provisions present","No regulatory obligations currently imposed"],"plain_english_summary":"This document is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it was about:**\nThe directive (numbered AD/HS 125/38) originally required owners and operators of **British Aerospace BAe 125 series aircraft** to inspect and modify the elevator trim tabs on their planes. Elevator trim tabs are small adjustable surfaces on the tail of an aircraft that help pilots maintain steady flight without constantly holding the controls.\n\n**Why it mattered:**\nTrim tab problems can affect an aircraft's ability to maintain stable flight, potentially creating safety risks.\n\n**Current status:**\nThe directive's actual requirements have been **removed from the official listing** because no BAe 125 aircraft are currently registered in Australia. This is a housekeeping measure — when no affected aircraft exist in the country, the active safety requirements are withdrawn to keep the regulatory register clean and current."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-38-elevator-trim-tabs-inspection-and-modification","history":"/api/acts/ad-hs-125-38-elevator-trim-tabs-inspection-and-modification/history","analysis":"/api/acts/ad-hs-125-38-elevator-trim-tabs-inspection-and-modification/analysis","conflicts":"/api/acts/ad-hs-125-38-elevator-trim-tabs-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-hs-125-38-elevator-trim-tabs-inspection-and-modification/important-cases","documents":"/api/acts/ad-hs-125-38-elevator-trim-tabs-inspection-and-modification/documents"}}