{"id":"F2006B02406","name":"AD/ANSON/1 - Tail Plane Bracing - Modification","slug":"ad-anson-1-tail-plane-bracing-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41649,"registerId":"commonwealth-F2006B02406-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ANSON/1 - Tail Plane Bracing - 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)  Avro Anson and Avro 19 Series Aeroplanes\n\n \n\nAD/ANSON/1 Tail Plane Bracing - Modification 2/51\n\nApplicability: Anson.\n\n \n\nDocument: 1. A.V. Roe Anson Mod. No. 108; or\n\n \n\n2. RAAF Anson Order No. 3; or 3. ANO 104.1.31.4.5.1.\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 focused specifically on tail plane bracing modifications for one aircraft type. It has not expanded beyond its original technical safety purpose. The document appears to be a historical directive (reference '2/51' suggests February 1951), and its scope remains tightly constrained to the specific structural modification required."},"complexity_factors":["Extremely short document — only 8 substantive lines","No defined terms section; all terms are common aviation parlance","Simple conditional structure: single applicability criterion ('Anson') with three alternative compliance pathways","No cross-references to other legislation beyond the enabling regulation (Civil Aviation Regulations 1998, Part 39)","No exceptions, exemptions, or nested conditions","Straightforward command structure: applicability → document reference → compliance deadline"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially 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 modify the **tail plane bracing** (the structural supports for the horizontal tail section of the plane).\n\n**Who it affects:**\n- Anyone who owns or operates an **Anson** aircraft — a British twin-engine aircraft used extensively in WWII and post-war Australia.\n\n**What must be done:**\n- The modification must be carried out **\"forthwith\"** (immediately, without delay).\n- The work must follow one of three approved technical documents:\n  1. A.V. Roe Modification No. 108 (from the original manufacturer), **or**\n  2. RAAF Anson Order No. 3 (Royal Australian Air Force technical order), **or**\n  3. ANO 104.1.31.4.5.1 (an Air Navigation Order — a regulatory technical standard).\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety instructions. If you don't comply, you cannot legally fly the aircraft. This particular directive addresses structural integrity of the tail — critical for flight safety. Non-compliance grounds the aircraft."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The provided text sets a narrow scope: it applies to Anson aircraft and mandates modification of tail‑plane bracing by following one of three specified documents, with compliance required immediately. The text does not indicate any change to that scope or to the list of affected aircraft within the excerpt provided."},"complexity_factors":["Very short and narrowly targeted directive limited to a single aircraft type (Applicability: Anson).","Immediate compliance requirement creates time pressure (Compliance: Forthwith).","Technical detail is not included in the directive text; compliance depends on three external documents that must be obtained and followed (Document: list).","No alternatives, exemptions or compliance timetable are stated in the provided text, producing potential operational ambiguity.","Authority and legal basis are standard (Part 39 schedule) but enforcement and administrative processes are not detailed in the excerpt (header)."],"plain_english_summary":"This Airworthiness Directive requires immediate modification of the tail‑plane bracing on Anson (Avro Anson) aircraft. Operators must comply forthwith by following one of three specified technical documents (A.V. Roe Mod No.108, RAAF Anson Order No.3, or ANO 104.1.31.4.5.1). The obligation falls on owners/operators who must obtain the documents, arrange the work, and bear the costs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-anson-1-tail-plane-bracing-modification","history":"/api/acts/ad-anson-1-tail-plane-bracing-modification/history","analysis":"/api/acts/ad-anson-1-tail-plane-bracing-modification/analysis","conflicts":"/api/acts/ad-anson-1-tail-plane-bracing-modification/conflicts","importantCases":"/api/acts/ad-anson-1-tail-plane-bracing-modification/important-cases","documents":"/api/acts/ad-anson-1-tail-plane-bracing-modification/documents"}}