{"id":"F2006B02417","name":"AD/ANSON/2 - Rudder Pedal Centre Gears - Guard Installation","slug":"ad-anson-2-rudder-pedal-centre-gears-guard-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41660,"registerId":"commonwealth-F2006B02417-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ANSON/2 - Rudder Pedal Centre Gears - Guard Installation","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)  Avro Anson and Avro 19 Series Aeroplanes\n\n \n\nAD/ANSON/2 Rudder Pedal Centre Gears - Guard Installation 2/51\n\nApplicability: Anson.\n\n \n\nDocument: 1. A.V. Roe Anson Mod. No. 121; or\n\n \n\n2. RAAF Anson Order No. 18; or 3. ANO 105.1.31.4.5.2.\n\nCompliance: Forthwith.\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":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1951 concerning one specific mechanical modification to one specific aircraft type. There is no evidence of scope creep; it has remained a narrow safety order throughout its lifespan."},"complexity_factors":["Extremely short document (under 200 words)","Only one defined applicability term ('Anson')","No cross-references to other legislation beyond the enabling regulations (Civil Aviation Regulations 1998, Part 39)","Simple binary compliance structure: either comply using one of three listed documents, or don't","No conditional logic, exceptions, or nested provisions","Single, unambiguous operative requirement (install guard)","Historical document format with minimal regulatory scaffolding"],"plain_english_summary":"This is an **Airworthiness Directive** (AD) — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:**\n- Requires owners and operators of **Avro Anson aircraft** to install a guard on the **rudder pedal centre gears**.\n- This is a physical modification to prevent something going wrong with the rudder pedals (the foot controls that steer the aircraft on the ground and coordinate turns in the air).\n\n**Who it affects:**\n- Anyone who owns or operates an **Avro Anson** — a British twin-engine aircraft used extensively in WWII for training and maritime patrol, now mostly found in museums or with historical aviation groups.\n\n**Why it matters:**\n- The centre gears in the rudder pedal mechanism apparently posed a safety risk (likely entanglement, interference, or mechanical failure) that needed immediate fixing.\n- The directive is marked **\"Forthwith\"** — meaning compliance is required immediately, not at the next scheduled maintenance.\n\n**How to comply:**\nOperators must follow one of three approved technical documents:\n- A.V. Roe (the manufacturer) Modification No. 121; or\n- Royal Australian Air Force (RAAF) Anson Order No. 18; or\n- Air Navigation Order (ANO) 105.1.31.4.5.2\n\nThis is a **historical directive** (reference number 2/51 suggests it dates to 1951) that remains on the books for any remaining airworthy Ansons."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text provides no history or comparison to a prior version and does not indicate any change in scope. It applies to Anson aircraft and mandates guard installation per one of three listed documents, with immediate compliance. No amendment or narrowing/broadening language is present in the supplied text."},"complexity_factors":["Very short directive with few operative clauses","Immediate compliance requirement ('Forthwith') increases practical urgency","Technical details are not included and are delegated to three external documents","Single-model applicability (Anson) limits scope","Operator discretion to choose among listed documents may create ambiguity if those documents differ"],"plain_english_summary":"This directive requires immediate installation of a guard on the rudder pedal centre gears of Avro Anson aircraft, affecting Anson owners/operators and the maintenance personnel who must carry out the work. \n\nCompliance is \"forthwith\" and must follow one of three specified technical documents; costs and scheduling are the owner/operator's responsibility."}},"importantCases":[],"_links":{"self":"/api/acts/ad-anson-2-rudder-pedal-centre-gears-guard-installation","history":"/api/acts/ad-anson-2-rudder-pedal-centre-gears-guard-installation/history","analysis":"/api/acts/ad-anson-2-rudder-pedal-centre-gears-guard-installation/analysis","conflicts":"/api/acts/ad-anson-2-rudder-pedal-centre-gears-guard-installation/conflicts","importantCases":"/api/acts/ad-anson-2-rudder-pedal-centre-gears-guard-installation/important-cases","documents":"/api/acts/ad-anson-2-rudder-pedal-centre-gears-guard-installation/documents"}}