{"id":"F2006B10518","name":"AD/HS 125/77 Amdt 1 - Flap Drive Torque Shaft","slug":"ad-hs-125-77-amdt-1-flap-drive-torque-shaft","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116299,"registerId":"commonwealth-F2006B10518-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HS 125/77 Amdt 1 - Flap Drive Torque Shaft","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 125/77\n\nAmdt 1\n\n\nFlap Drive Torque Shaft  10/86 DM\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","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The entry formerly identified an AD that applied to the British Aerospace BAe 125 series (subject: flap drive torque shaft). The supplied material states that the AD \"has been removed from the listing because the aircraft model is not currently on the register.\" This narrows the AD's current domestic scope to none for registered aircraft of that model (the listing no longer presents it as an active entry for the domestic register). The source does not provide the original AD text, nor procedures for reinstatement, so the change reflected is limited to removal from the public listing on the stated administrative ground."},"complexity_factors":["Document is a brief administrative note rather than a substantive regulatory rule","Absence of the AD's operative technical text (no compliance steps, intervals or requirements supplied)","Outcome depends entirely on aircraft register status (simple condition)","No cross-references, definitions, or procedural detail included in the supplied material","Low ambiguity about the single administrative action described (removal from listing)"],"plain_english_summary":"An Airworthiness Directive titled \"Flap Drive Torque Shaft\" for British Aerospace BAe 125 series aeroplanes has been removed from the Civil Aviation Safety Authority’s Schedule of Airworthiness Directives because that aircraft model is \"not currently on the register.\" This is an administrative removal: there is no listed domestic AD obligation for BAe 125s at present; had the model been registered, operators would have been the affected parties."},"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This document represents the complete lifecycle of a specific Airworthiness Directive. It was originally issued to address a safety issue with flap drive torque shafts on BAe 125 aircraft, and has now been formally removed from the active register because the affected aircraft type is no longer registered in Australia. The scope has not expanded beyond its original purpose; rather, it has been terminated due to lack of applicability."},"complexity_factors":["Extremely short document (under 100 words)","No defined terms section","No cross-references to other legislation","No conditional logic or procedural steps","Essentially a withdrawal notice rather than an active regulatory instrument","Single subject matter with no exceptions or nested provisions"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety instruction issued by Australia's Civil Aviation Safety Authority (CASA) that tells aircraft owners and operators they must fix or inspect specific parts of their planes.\n\n**What it covers:** This particular AD applies to **British Aerospace BAe 125 series aircraft** (a type of business jet). It originally required action related to the **flap drive torque shaft** — a mechanical component that helps control the flaps (the movable surfaces on the wings that help planes slow down and land).\n\n**What happened to it:** The directive has been **removed from active use** because there are currently no BAe 125 aircraft registered in Australia. CASA withdrew it since there are no planes in the country that need to comply.\n\n**Why it matters:** Airworthiness Directives are critical safety tools. Even though this one is inactive now, it shows how aviation safety works — when a potential mechanical problem is identified, regulators issue mandatory fixes. When the affected aircraft leave the register, the directive gets shelved but remains on record in case those aircraft types return to Australian skies."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-77-amdt-1-flap-drive-torque-shaft","history":"/api/acts/ad-hs-125-77-amdt-1-flap-drive-torque-shaft/history","analysis":"/api/acts/ad-hs-125-77-amdt-1-flap-drive-torque-shaft/analysis","conflicts":"/api/acts/ad-hs-125-77-amdt-1-flap-drive-torque-shaft/conflicts","importantCases":"/api/acts/ad-hs-125-77-amdt-1-flap-drive-torque-shaft/important-cases","documents":"/api/acts/ad-hs-125-77-amdt-1-flap-drive-torque-shaft/documents"}}