{"id":"F2006B03607","name":"AD/BEA 206/4 - Main and Nose Undercarriage Legs","slug":"ad-bea-206-4-main-and-nose-undercarriage-legs","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43198,"registerId":"commonwealth-F2006B03607-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEA 206/4 - Main and Nose Undercarriage Legs","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)  Beagle B206 Series Aeroplanes\n\n \n\nAD/BEA 206/4 Main and Nose Undercarriage Legs 11/68\n\nApplicability: Model B206 Series 1 and Series 2.\n\n \n\nRequirement: Action in accordance with Beagle SB No. B206/27.\n\n \n\nCompliance: Inspect within 25 hours time in service after 13 January 1969. Modify within 200 hours time in service after 13 January 1969.\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\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive sets a targeted, model‑specific requirement: inspect and modify main and nose undercarriage legs on Beagle B206 Series 1 and Series 2 aircraft, following Beagle SB No. B206/27, with fixed compliance windows (Applicability, Requirement, Compliance clauses). The instrument does not state any alteration to that stated scope or indicate it replaces or narrows a prior instrument; therefore there is no indication in the text that the scope has changed from an earlier intent."},"complexity_factors":["Narrow applicability (only Beagle B206 Series 1 and Series 2) reduces the number of affected parties and simplifies scope (Applicability clause).","The AD refers to an external technical document (Beagle SB No. B206/27) for the actual work instructions, so compliance depends on an external source that is not included in the directive (Requirement clause).","Short initial inspection window (25 hours time in service) creates operational urgency and scheduling pressure (Compliance clause).","A two‑stage requirement (inspect then modify) requires planning across inspection and subsequent modification work (Compliance clause).","The directive is regulatory and time‑bound, so there is a compliance enforcement context even though enforcement detail is not stated (document heading + Compliance clause).","Lack of technical detail in the directive itself increases practical complexity for operators who must obtain and interpret the Service Bulletin (Requirement clause)."],"plain_english_summary":"This airworthiness directive requires owners/operators of Beagle B206 Series 1 and 2 aeroplanes to inspect and modify the main and nose undercarriage legs in accordance with Beagle Service Bulletin No. B206/27. The inspection must be carried out within 25 hours’ time in service after 13 January 1969 and the modification completed within 200 hours; compliance is a regulatory obligation and imposes inspection, parts, labour and downtime costs on affected operators."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive from 1968 with a narrow, specific scope (undercarriage legs on two specific aircraft series). It has not expanded beyond its original technical safety purpose."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 2 defined applicability criteria (Model B206 Series 1 and Series 2)","Single cross-reference to external technical document (Beagle SB No. B206/27)","Simple two-step compliance structure (inspect then modify) with clear timeframes","No nested exceptions, conditional clauses, or interpretive provisions","Straightforward command structure: Applicability → Requirement → Compliance"],"plain_english_summary":"**What this is:** 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:** It requires owners and operators of **Beagle B206 Series 1 and Series 2 aircraft** to inspect and modify the **main and nose undercarriage legs** (the landing gear struts that support the plane on the ground).\n\n**Who must act:** Anyone who owns or operates these specific Beagle aircraft models.\n\n**What must be done:**\n- **Inspection:** Check the undercarriage legs within **25 hours of flying time** after 13 January 1969\n- **Modification:** Carry out the required modifications within **200 hours of flying time** after 13 January 1969\n\n**How to comply:** Follow the technical instructions in **Beagle Service Bulletin No. B206/27** (the manufacturer's official safety notice).\n\n**Why it matters:** Undercarriage failures can cause serious accidents during takeoff or landing. This directive addresses a known safety defect before it causes an incident."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bea-206-4-main-and-nose-undercarriage-legs","history":"/api/acts/ad-bea-206-4-main-and-nose-undercarriage-legs/history","analysis":"/api/acts/ad-bea-206-4-main-and-nose-undercarriage-legs/analysis","conflicts":"/api/acts/ad-bea-206-4-main-and-nose-undercarriage-legs/conflicts","importantCases":"/api/acts/ad-bea-206-4-main-and-nose-undercarriage-legs/important-cases","documents":"/api/acts/ad-bea-206-4-main-and-nose-undercarriage-legs/documents"}}