{"id":"F2006B10479","name":"AD/HS 125/40 - Upper Airbrake Outboard Hinge Attach Bolts - Replacement","slug":"ad-hs-125-40-upper-airbrake-outboard-hinge-attach-bolts-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116221,"registerId":"commonwealth-F2006B10479-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HS 125/40 - Upper Airbrake Outboard Hinge Attach Bolts - Replacement","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 125/40 Upper Airbrake Outboard Hinge Attach Bolts - Replacement\n\n\n8/75\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":{"kimi_summary":{"content_quality":"rejected","complexity_score":1,"rejection_reason":"This is a navigation stub/placeholder page with no substantive legislative content. The actual Airworthiness Directive content has been removed, leaving only a note explaining why it's no longer listed. There are no operative provisions, requirements, or meaningful legal text to analyse.","scope_assessment":{"changed":false,"description":"The scope has not expanded; rather, it has been nullified. The directive originally applied to a specific aircraft type and maintenance task. When that aircraft type left the Australian register, the directive was effectively retired rather than expanded."},"complexity_factors":["Document is essentially a placeholder/stub — the substantive content has been removed","No operative provisions, defined terms, or conditional logic remain","Single sentence of explanatory text only","No cross-references to other legislation or technical standards","Originally a simple maintenance instruction (replace specific bolts on specific aircraft model)"],"plain_english_summary":"This document is an **Airworthiness Directive (AD)** — a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) that requires specific maintenance action on aircraft.\n\n**What it was about:**\nThis particular AD (numbered AD/HS 125/40) originally required the **replacement of upper airbrake outboard hinge attach bolts** on **British Aerospace BAe 125 series aeroplanes** (business jets). Airbrakes are panels on an aircraft's wings or fuselage that pop up to increase drag and slow the plane down — critical for safe landing and descent. The bolts attaching these hinges needed replacement to prevent potential mechanical failure.\n\n**Current status:**\n**The directive has been removed from active use.** The document explicitly states that \"the aircraft model is not currently on the register\" — meaning no BAe 125 aircraft are currently registered to fly in Australia, so this safety requirement no longer applies to any Australian-registered planes.\n\n**Why it matters:**\nAirworthiness Directives are legally enforceable safety instructions. When active, aircraft owners and operators must comply or the aircraft cannot fly legally. This example shows how aviation safety regulation adapts — when aircraft types leave the Australian fleet, their specific maintenance directives are retired from active schedules even though they remain on record for historical reference."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The supplied text shows the AD entry has been removed from the public listing because the BAe 125 model is not currently on the register. The original scope (as implied by the title: mandating replacement of upper airbrake outboard hinge attach bolts on BAe 125 series aeroplanes) therefore no longer appears as an active listing for aircraft on the register in this jurisdiction. The source does not provide the original operative provisions or any transitional or continuing obligations, so the removal note (as supplied) is the only explicit indication that the AD’s practical scope has been altered."},"complexity_factors":["Document contains only a title, identifier (AD/HS 125/40), date (8/75) and a single status note; absence of operative provisions reduces textual complexity.","Lack of technical detail (no parts specification, no compliance procedure, no timelines) increases interpretive uncertainty despite low textual complexity.","Regulatory context implied (airworthiness directive under Civil Aviation Safety Authority) introduces external regulatory linkage that would require cross-referencing other materials to fully understand application.","Historical element (dated 8/75) and a removal note create legal-status uncertainty without access to register or archival records."],"plain_english_summary":"The instrument is an airworthiness directive (AD/HS 125/40, 8/75) titled to require replacement of the upper airbrake outboard hinge attach bolts on British Aerospace BAe 125 series aeroplanes. It therefore targets BAe 125 owners/operators and matters for flight safety and maintenance planning.\n\nThe supplied record lacks the AD’s body — no compliance deadlines, technical specs, cost or enforcement details — and the entry has been removed because the aircraft model is not currently on the register."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-40-upper-airbrake-outboard-hinge-attach-bolts-replacement","history":"/api/acts/ad-hs-125-40-upper-airbrake-outboard-hinge-attach-bolts-replacement/history","analysis":"/api/acts/ad-hs-125-40-upper-airbrake-outboard-hinge-attach-bolts-replacement/analysis","conflicts":"/api/acts/ad-hs-125-40-upper-airbrake-outboard-hinge-attach-bolts-replacement/conflicts","importantCases":"/api/acts/ad-hs-125-40-upper-airbrake-outboard-hinge-attach-bolts-replacement/important-cases","documents":"/api/acts/ad-hs-125-40-upper-airbrake-outboard-hinge-attach-bolts-replacement/documents"}}