{"id":"F2006B10528","name":"AD/HS 125/86 - Flight Data Recorder","slug":"ad-hs-125-86-flight-data-recorder","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116319,"registerId":"commonwealth-F2006B10528-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HS 125/86 - Flight Data Recorder","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 125/86 Flight Data Recorder 6/87\n\nThis AD contents has been removed from the listing because the aircraft model is not currently on the register.\n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The AD entry has been removed from the published listing because the BAe 125 series is not currently on the Australian register. As a result, the active scope of the listed instrument in the public schedule is effectively reduced to nil for Australian-registered aircraft. The source does not provide the original operative requirements, so it is not possible from this document to say whether the AD’s substantive technical scope has been amended, repealed, or is simply not currently applicable due to absence of affected aircraft on the register."},"complexity_factors":["Source contains only a listing entry with title and removal note; operative requirements are absent","Regulatory context (Part 39 AD mechanism) is standard but the specific technical content is missing","Effect depends on aircraft presence on the national register, introducing conditional scope","Potential external dependencies (original AD text, register status over time) are not included in source"],"plain_english_summary":"### What this instrument is\n\n- The document is an Airworthiness Directive (AD) titled \"AD/HS 125/86 — Flight Data Recorder\" that applied to British Aerospace BAe 125 series aeroplanes. It is recorded under the Commonwealth of Australia, Civil Aviation Regulations 1998, Part 39 — Schedule of Airworthiness Directives (Civil Aviation Safety Authority). The AD entry carries the identifier \"6/87\" (presumably the original issue date or publication reference).\n\n### What it does, mechanically\n\n- The source entry names an AD about a \"Flight Data Recorder\" for BAe 125 series aeroplanes (AD/HS 125/86). The source text available here does not include the operative requirements or technical instructions of the AD itself — those details have been removed from the listing. (Source: \"AD/HS 125/86 Flight Data Recorder 6/87\".)\n\n- The entry in the public listing has been removed because \"the aircraft model is not currently on the register.\" That means the AD entry no longer appears in the schedule of ADs for aircraft currently registered in Australia. (Source: \"This AD contents has been removed from the listing because the aircraft model is not currently on the register.\")\n\n### Who is affected\n\n- If the BAe 125 series aeroplanes had been on the Australian register, the primary affected parties would have been the aircraft owners and operators: they would have been required to comply with whatever inspection, modification, or record-keeping actions the AD specified. (This follows from the nature of ADs as regulatory actions directed at registered aircraft; the AD entry name indicates the target model.)\n\n- As the AD contents have been removed from the public listing for the reason stated, there is no active compliance obligation under this listed entry for aircraft currently on the Australian register. (Source: removal statement.)\n\n### Who decides and who pays\n\n- The Civil Aviation Safety Authority (CASA) is the regulatory body that issues and publishes ADs under the Civil Aviation Regulations framework (Part 39 — Schedule of Airworthiness Directives). Costs of compliance, if the AD were active for registered aircraft, would fall on the aircraft owners/operators (for actions such as inspections, repairs, equipment changes or record-keeping). (Source: header referencing Part 39 and the AD entry.)\n\n- Because the entry has been removed from the listing due to the model not being on the register, those costs are not currently being incurred under this particular AD for Australian-registered aircraft. (Source: removal statement.)\n\n### Incentives, trade-offs and implementation notes (source-grounded)\n\n- The AD’s title indicates a regulatory intervention targeted at flight data recorder matters for a defined model. That creates a concrete compliance obligation for any affected aircraft while it is on the register. The concrete mechanism for imposing that obligation is the AD publication under the Part 39 schedule. (Source: AD title and schedule header.)\n\n- Removal from the public AD listing changes incentives and obligations: with the BAe 125 series not on the register, operators in Australia do not face enforcement of this specific listed AD, so they avoid the direct compliance costs associated with it while the aircraft remain unregistered locally. (Source: removal statement.)\n\n- The document as supplied does not record the AD’s technical content, so it is not possible from this source to identify the specific operational, safety, or economic trade-offs the AD required (for example, inspection intervals, parts to be replaced, or equipment standards). Any concrete assessment of implementation burden or substitution effects would require the removed AD text or the original AD record.\n\n### Practical takeaways\n\n- The entry existed and concerned flight data recorder requirements for BAe 125 series aeroplanes, but the public listing entry has been removed because the model is not on the Australian register. Therefore, there is no active obligation under this listed AD for aircraft currently on the register. If BAe 125 aircraft are later re-registered in Australia, the AD content may be re-published or otherwise made enforceable under Part 39 — but that step is not recorded in this source.\n\nSources cited in text: the AD header (Commonwealth of Australia — Civil Aviation Regulations 1998, Part 39 — Schedule of Airworthiness Directives), the AD identifier and title (AD/HS 125/86 — Flight Data Recorder 6/87), and the removal statement: \"This AD contents has been removed from the listing because the aircraft model is not currently on the register.\""},"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"Not applicable — this is a current administrative record of a withdrawn directive, not an evolution of legislative scope."},"complexity_factors":["Document is a stub/placeholder entry (only 4 sentences of substantive content)","No operative provisions, conditions, or requirements currently in force","No defined terms, cross-references, or technical specifications present in this version","Content explicitly states it has been 'removed from the listing'"],"plain_english_summary":"This 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 or check something on their plane.\n\n**What it covers:** British Aerospace BAe 125 series business jets (a type of small corporate aircraft).\n\n**What it was about:** Flight Data Recorders — the \"black box\" devices that record flight information to help investigators work out what went wrong if there's an accident.\n\n**Current status:** This directive has been **removed from the active list** because there are currently no BAe 125 aircraft registered in Australia. In other words, CASA has shelved this safety order since there are no planes here that need to comply with it right now.\n\n**Why it matters:** Airworthiness Directives are legally binding safety instructions. Even though this one is inactive, it shows how aviation safety works — regulators issue specific technical mandates for specific aircraft types, and clean up the rulebook when those aircraft leave the fleet."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-86-flight-data-recorder","history":"/api/acts/ad-hs-125-86-flight-data-recorder/history","analysis":"/api/acts/ad-hs-125-86-flight-data-recorder/analysis","conflicts":"/api/acts/ad-hs-125-86-flight-data-recorder/conflicts","importantCases":"/api/acts/ad-hs-125-86-flight-data-recorder/important-cases","documents":"/api/acts/ad-hs-125-86-flight-data-recorder/documents"}}