{"id":"F2006B02419","name":"AD/ANSON/21 Amdt 1 - Fuselage Covering - Inspection","slug":"ad-anson-21-amdt-1-fuselage-covering-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41662,"registerId":"commonwealth-F2006B02419-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ANSON/21 Amdt 1 - Fuselage Covering - Inspection","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/21\n\nAmdt 1\n\n\nFuselage Covering - Inspection 11/67\n\n \n\nApplicability: Anson and Avro 19.\n\n \n\nDocument: Avro TSB No. 80 paragraph 3.9.\n\n \n\nCompliance: At intervals not exceeding 100 hours time in service.\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\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is Amendment 1 to an existing Airworthiness Directive. The scope remains tightly focused on fuselage inspection for two specific vintage aircraft types. There is no evidence of scope creep; it maintains the original narrow safety purpose for heritage aircraft maintenance."},"complexity_factors":["Extremely short document — only 8 substantive lines","No defined terms section; all language is plain operational English","Single, unambiguous compliance requirement (100-hour interval)","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998 citation","No conditional logic, exceptions, or alternative compliance methods","References only one external technical document (Avro TSB No. 80) without reproducing its content"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to owners and operators of **Avro Anson and Avro 19 series aircraft** (vintage twin-engine planes originally built in the 1930s–40s).\n\n**What it requires:**\n- **Inspection of the fuselage covering** — the outer skin/fabric of the aircraft body must be checked for damage, deterioration, or unsafe conditions.\n- **How often:** Every **100 hours of flight time** (\"time in service\" means actual flying hours, not just calendar time).\n\n**Why it matters:**\nThese are very old aircraft. The fuselage fabric can degrade from UV exposure, weather, wear, and age. This directive prevents structural failures that could lead to loss of control or crash. It mandates recurring inspections based on a specific technical service bulletin (Avro TSB No. 80) from the original manufacturer.\n\n**Who must comply:**\nAnyone operating these specific aircraft types in Australia — typically heritage aviation museums, warbird operators, or private collectors maintaining historic military aircraft."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The provided text is an amendment label (\"Amdt 1\") but does not include the original directive text or the previous scope for comparison. Based on the excerpt alone, there is no information showing how the scope was changed from the original; therefore a change cannot be determined from the supplied material."},"complexity_factors":["Narrow applicability limited to two aircraft types (Anson and Avro 19) — reduces scope complexity (Applicability).","Single, clear compliance interval: inspections at intervals not exceeding 100 hours time in service — straightforward timing requirement (Compliance).","Dependence on an external technical document (Avro TSB No. 80 paragraph 3.9) introduces interpretive complexity: the precise inspection method and judgment criteria are not set out in the directive text (Document).","The directive text does not specify documentation, enforcement, or acceptable repair actions, which may require operators to consult additional regulatory material or guidance.","Potential operational complexity from scheduling inspections and any follow-on repairs (implicit from Compliance and Document references)."],"plain_english_summary":"This directive mandates regular inspections of fuselage covering on Anson and Avro 19 aeroplanes, to be performed per Avro Technical Service Bulletin No. 80, paragraph 3.9, at intervals no greater than 100 hours time in service. It directly affects owners/operators and maintenance providers, imposing inspection costs, scheduling disruption, and compliance risk for non‑adherence."}},"importantCases":[],"_links":{"self":"/api/acts/ad-anson-21-amdt-1-fuselage-covering-inspection","history":"/api/acts/ad-anson-21-amdt-1-fuselage-covering-inspection/history","analysis":"/api/acts/ad-anson-21-amdt-1-fuselage-covering-inspection/analysis","conflicts":"/api/acts/ad-anson-21-amdt-1-fuselage-covering-inspection/conflicts","importantCases":"/api/acts/ad-anson-21-amdt-1-fuselage-covering-inspection/important-cases","documents":"/api/acts/ad-anson-21-amdt-1-fuselage-covering-inspection/documents"}}