{"id":"F2006B10389","name":"AD/HS 125/111 - NLG Wheel Location Plate Retaining Nuts","slug":"ad-hs-125-111-nlg-wheel-location-plate-retaining-nuts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116043,"registerId":"commonwealth-F2006B10389-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HS 125/111 - NLG Wheel Location Plate Retaining Nuts","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 125/111 NLG Wheel Location Plate Retaining Nuts 11/90\n\nDM\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","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The Schedule entry indicates the AD has been removed from the listing on the stated ground that the BAe 125 model is not currently on the Australian register. Mechanically, this reduces the AD’s practical scope in Australia to nil while the type remains unregistered; the original AD (title) targeted NLG wheel location plate retaining nuts on BAe 125 series aircraft, but the supplied text does not include the original operative requirements or compliance scope."},"complexity_factors":["Minimal substantive content: the operative requirements of the AD are not included in the supplied text.","Narrow applicability: applies to a single aircraft type (BAe 125 series).","Administrative status change: the entry states removal from the active listing rather than specifying ongoing obligations.","Lack of procedural detail: no inspection, modification, compliance timeframes, or enforcement details present.","Dependence on registry status: applicability is contingent on whether the model is on the Australian register."],"plain_english_summary":"### What this instrument is\n\nThis entry is an Airworthiness Directive (AD) for British Aerospace BAe 125 series aeroplanes, titled \"AD/HS 125/111 — NLG Wheel Location Plate Retaining Nuts\" (dated 11/90). An AD normally instructs owners/operators to inspect, modify or repair a specified aircraft part to maintain airworthiness. The title of this AD indicates it concerned the nose landing gear (NLG) wheel location plate retaining nuts (this is the stated subject in the AD heading).\n\n### What the document does now (mechanically)\n\n- The listing for this AD has been removed from the published Schedule of Airworthiness Directives because the BAe 125 model is not currently on the Australian aircraft register. (Text: \"This AD contents has been removed from the listing because the aircraft model is not currently on the register.\")\n- Because the AD has been removed from the listing for that reason, there are no active, listed obligations in that Schedule for operators of BAe 125s in Australia at present.\n\n### Who this would affect if active\n\n- Owners and operators of BAe 125 series aeroplanes in Australia would be the direct addressees of the AD (by virtue of the AD applying to that aircraft type). Maintenance organisations and licensed engineers who service those aircraft would also carry out any required inspections or rectification work.\n\n### Stated purpose and what we can test against costs and incentives\n\n- Stated purpose (from the AD heading): to address issues with NLG wheel location plate retaining nuts. That is the AD's subject claim; the listing does not set out the operative measures (inspection intervals, replacement, or modification instructions) in the text provided.\n\n- Costs and incentives: because the AD has been removed from the Schedule on the stated ground that the type is not on the register, there is currently no compliance cost for Australian-registered operators (the removal itself is the source statement). Had the AD been active, the compliance costs would have been borne by the aircraft owners/operators and their maintenance providers (inspection, parts, labour). These are logical corollaries of how ADs operate; specific cost magnitudes are not provided in the text.\n\n- Trade-offs and opportunity costs: the text supplied does not quantify the safety benefit, nor the resources required. Any assessment of the balance between safety gain and compliance cost would require the missing operative content of the AD.\n\n### Implementation, compliance burden and discretion\n\n- Implementation and compliance burden cannot be determined from this listing because the operative requirements of the AD are not included in the supplied text.\n- The administrative decision recorded in the Schedule — removing the AD from the listing because the model is not on the register — is an instance of regulatory discretion about whether to keep a historical AD visible in the active listing. The listing gives that reason but does not show a substantive revocation or the original compliance text.\n\n### Effects on private choice and market actors\n\n- Immediately: no effect on the conduct of Australian-registered BAe 125 operators (per the removal statement).\n- Potentially: if a BAe 125 were re-registered in Australia, the AD would presumably reappear or be enforceable in some form; operators in that scenario would face the choice of meeting any inspection or repair requirements set out in the AD.\n\n### Bottom line\n\nThe document records an AD that targeted NLG wheel location plate retaining nuts on BAe 125 aeroplanes, but that entry has been removed from the Schedule on the stated ground that the aircraft type is not on the Australian register. The listing as supplied does not include the AD’s operative requirements, so specific compliance steps, costs and timelines are not available in this text."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This document has not expanded beyond its original purpose. It was always a specific technical directive targeting a single mechanical issue on a specific aircraft type. The only change is its administrative status — it has been archived rather than expanded."},"complexity_factors":["Extremely short document (under 200 words)","No operative provisions remaining — content has been removed","No defined terms, cross-references, or conditional logic present","Simple administrative notation explaining archival status","Originally a technical directive but now reduced to a placeholder record"],"plain_english_summary":"This document is an **Airworthiness Directive (AD)** — essentially a safety order issued by Australia's Civil Aviation Safety Authority (CASA) telling aircraft owners and operators they must fix a specific mechanical problem.\n\n**What it covers:**\n- **Aircraft type:** British Aerospace BAe 125 series business jets\n- **The problem:** Nuts that hold the nose landing gear (NLG) wheel location plate in place — these nuts could potentially fail or come loose, creating a safety risk\n- **The fix:** The directive would normally specify inspection and replacement requirements for these retaining nuts\n\n**Current status:**\nThis particular directive has been **removed from the active list** because no BAe 125 aircraft are currently registered in Australia. In other words, CASA has shelved this safety order since there are no planes here that need the fix anymore.\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety instructions. Even though this one is inactive, it illustrates how aviation safety works — mechanical defects get tracked, fixes get mandated, and regulators clean up the rulebook when aircraft types leave the fleet."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-111-nlg-wheel-location-plate-retaining-nuts","history":"/api/acts/ad-hs-125-111-nlg-wheel-location-plate-retaining-nuts/history","analysis":"/api/acts/ad-hs-125-111-nlg-wheel-location-plate-retaining-nuts/analysis","conflicts":"/api/acts/ad-hs-125-111-nlg-wheel-location-plate-retaining-nuts/conflicts","importantCases":"/api/acts/ad-hs-125-111-nlg-wheel-location-plate-retaining-nuts/important-cases","documents":"/api/acts/ad-hs-125-111-nlg-wheel-location-plate-retaining-nuts/documents"}}