{"id":"F2006B10529","name":"AD/HS 125/87 - Wing Bottom Skin","slug":"ad-hs-125-87-wing-bottom-skin","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116321,"registerId":"commonwealth-F2006B10529-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HS 125/87 - Wing Bottom Skin","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 125/87 Wing Bottom Skin 7/87\n\nThis AD contents has been removed from the listing because the aircraft model is not currently on the register.\n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a historical administrative entry noting the removal of an Airworthiness Directive from active status. There is no indication of scope creep; the entry simply reflects that the underlying aircraft type is no longer on the Australian register."},"complexity_factors":["Extremely short document — essentially a stub entry","No operative provisions, conditions, or requirements currently in force","No defined terms, cross-references, or procedural steps","Content is purely administrative (noting removal from register)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) telling aircraft owners and operators they must fix a specific safety problem.\n\n**What it covers:**\n- **Aircraft type:** British Aerospace BAe 125 series business jets\n- **Issue:** Wing bottom skin (the lower surface of the aircraft's wing)\n- **Original directive number:** AD/HS 125/87, issued in July 1987 (the \"7/87\")\n\n**Current status:**\nThis directive has been **removed from the active list** because no BAe 125 aircraft are currently registered in Australia. In other words, CASA no longer needs to enforce this particular safety fix because there are no planes of this type flying under Australian registration that would need it.\n\n**Why this matters:**\nAirworthiness Directives are critical safety tools. When an aircraft type is in use, ADs are legally binding — ignoring them can ground a plane or lead to penalties. This entry shows how CASA cleans up its rulebook when aircraft types leave the Australian register, keeping the regulations relevant and uncluttered."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The entry originally recorded an airworthiness directive applicable to BAe 125 series aeroplanes (AD/HS 125/87, 7/87). The published record now states that the AD contents have been removed from the schedule because the aircraft model is not currently on the Australian register. That removal narrows the entry’s present scope to nil for Australian-registered aircraft as expressed in the document (This AD contents has been removed from the listing because the aircraft model is not currently on the register)."},"complexity_factors":["Single short entry with a clear identifier (AD/HS 125/87) and date (7/87).","No technical requirements, procedures, or compliance timelines are included in the text provided.","A procedural status statement only (removed from listing) rather than substantive regulatory content.","Limited cross-references: the entry names the regulatory framework (Civil Aviation Regulations 1998, Part 39) but gives no further statutory detail in the excerpt.","Low number of stakeholders affected in practice because removal is tied to register status."],"plain_english_summary":"This record notes a single airworthiness directive, AD/HS 125/87, for the BAe 125 series (wing bottom skin) under Australia’s Part 39 schedule. It has been removed from the published schedule on the stated ground that the aircraft model is not currently on the Australian register. When active an AD would impose mandatory inspections/repairs on owners/operators; as removed, it creates no current obligations or compliance costs for Australian‑registered BAe 125s."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-87-wing-bottom-skin","history":"/api/acts/ad-hs-125-87-wing-bottom-skin/history","analysis":"/api/acts/ad-hs-125-87-wing-bottom-skin/analysis","conflicts":"/api/acts/ad-hs-125-87-wing-bottom-skin/conflicts","importantCases":"/api/acts/ad-hs-125-87-wing-bottom-skin/important-cases","documents":"/api/acts/ad-hs-125-87-wing-bottom-skin/documents"}}