{"id":"F2006B10502","name":"AD/HS 125/62 - Landing Gear Emergency Selector - Modification","slug":"ad-hs-125-62-landing-gear-emergency-selector-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116267,"registerId":"commonwealth-F2006B10502-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HS 125/62 - Landing Gear Emergency Selector - 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 125/62 Landing Gear Emergency Selector - Modification 6/83\n\nThis AD contents has been removed from the listing because the aircraft model is not currently on the register.\n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The AD originally applied to BAe 125 series aeroplanes and required a modification to the landing‑gear emergency selector (source: AD title and model line). The entry has been removed from the listing on the administrative basis that the aircraft model is not currently on the Australian register, which effectively narrows the AD’s practical scope to zero registered aircraft in Australia at present (source: \"This AD contents has been removed from the listing because the aircraft model is not currently on the register.\")."},"complexity_factors":["Very short instrument text: only title and removal note are present, limiting technical and procedural detail.","Narrow applicability: applies to a single aircraft model (British Aerospace BAe 125 series), which concentrates stakeholders.","Administrative dependency on register status: effect hinges on whether affected aircraft are on the Australian register (explicit removal reason).","Delegated administrative process: placement and removal are handled under Part 39 by the Civil Aviation Safety Authority, requiring familiarity with CASA procedures to interpret lifecycle of ADs.","Lack of technical specification in source increases ambiguity about exact modification steps and therefore about precise compliance costs and operational impact."],"plain_english_summary":"What this instrument did, mechanically\n\n- The instrument titled “AD/HS 125/62 Landing Gear Emergency Selector - Modification 6/83” was an airworthiness directive that required a modification to the landing‑gear emergency selector on British Aerospace BAe 125 series aeroplanes (source: title line “AD/HS 125/62 Landing Gear Emergency Selector - Modification 6/83” and model line “British Aerospace BAe 125 Series Aeroplanes”).\n\nWho it affected\n\n- The directive applied to owners and operators of BAe 125 series aeroplanes listed under the Australian register at the time the AD was active (source: placement in the Civil Aviation Safety Authority “SCHEDULE OF AIRWORTHINESS DIRECTIVES” under the Civil Aviation Regulations 1998, PART 39).\n\nWhy it matters and how it worked\n\n- Purpose claim: by being issued as a Schedule of Airworthiness Directives item, the AD was intended to address a safety‑related defect or non‑conformance in the landing‑gear emergency selector (source: context: “SCHEDULE OF AIRWORTHINESS DIRECTIVES”).\n- Mechanically, the AD imposed an obligation to carry out a specified modification to the aircraft component named in the title (the landing‑gear emergency selector). That obligation would normally require owners/operators to obtain parts, carry out work and record compliance in the aircraft’s maintenance/airworthiness records (inferred from the AD format and placement under Part 39).\n\nWho pays, who decides, and what changes in behaviour\n\n- Who pays: costs of parts, labour and any associated downtime would be met by the aircraft owner or operator of affected BAe 125 aircraft (inference from the AD applying to those operators; source: AD title and model line).\n- Who decides: the Civil Aviation Safety Authority issues and lists ADs under the Civil Aviation Regulations 1998 (source: heading “COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES”).\n- Behavioural change: operators of affected aircraft would be required to schedule and complete the modification and record compliance; suppliers/maintenance organisations would supply and fit the modification where needed.\n\nCurrent status and immediate effects\n\n- The listing for this AD has been removed because the BAe 125 model is not currently on the Australian register (source text: “This AD contents has been removed from the listing because the aircraft model is not currently on the register.”). That means the directive, as listed, is not currently active against any aircraft on the register.\n\nTrade‑offs, incentives and implementation considerations\n\n- Cost vs benefit: the direct costs fall on the relatively concentrated group of BAe 125 owners/operators (title and model line). The intended benefit is reduced operational risk associated with the named component (implied by placement in the Schedule of Airworthiness Directives).\n- Administrative discretion and scope linkage: removal from the public listing has been effected on the administrative ground that there are no registered BAe 125s in Australia, which changes the directive’s practical reach without altering the historical text of the AD itself (source: removal statement). If a BAe 125 were re‑registered in Australia, the administrative status could be revisited under the same Part 39 mechanisms.\n- Compliance burden and implementation risk: when active, the AD would have imposed a discrete compliance burden (parts, labour, downtime). The current removal reduces immediate compliance burden for Australian operators because no affected aircraft are on the register; it does not by itself describe technical details of the modification or ongoing monitoring requirements (the source contains only the AD title and the removal note)."},"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a withdrawn/cancelled directive with no current operative scope. The original scope (mandatory modification to landing gear systems on specific aircraft) was narrow and technical, and has now been eliminated entirely rather than expanded."},"complexity_factors":["Extremely short document — only a few sentences","No defined terms section","No conditional logic or cross-references to other legislation","Simple administrative status update (withdrawal notice)","No operative provisions currently in force"],"plain_english_summary":"This 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:** This particular directive (numbered AD/HS 125/62) originally required a modification to the **landing gear emergency selector** on **British Aerospace BAe 125 series aircraft** — a type of business jet. The modification was issued in June 1983.\n\n**What it is now:** The directive has been **removed from active use** because there are currently no BAe 125 aircraft registered in Australia. In other words, CASA has taken it off the books since there are no planes here that need the fix anymore.\n\n**Why it matters:** Airworthiness Directives are critical safety tools. They force aircraft owners to fix known defects or unsafe conditions. This entry shows how CASA maintains its regulatory list — cleaning up directives that no longer apply when aircraft types leave the Australian register."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-62-landing-gear-emergency-selector-modification","history":"/api/acts/ad-hs-125-62-landing-gear-emergency-selector-modification/history","analysis":"/api/acts/ad-hs-125-62-landing-gear-emergency-selector-modification/analysis","conflicts":"/api/acts/ad-hs-125-62-landing-gear-emergency-selector-modification/conflicts","importantCases":"/api/acts/ad-hs-125-62-landing-gear-emergency-selector-modification/important-cases","documents":"/api/acts/ad-hs-125-62-landing-gear-emergency-selector-modification/documents"}}