{"id":"F2006B03599","name":"AD/BEA 121/5 Amdt 1 - Rudder Control Lever Assembly P/N BE 45.10193","slug":"ad-bea-121-5-amdt-1-rudder-control-lever-assembly-p-n-be-45-10193","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43190,"registerId":"commonwealth-F2006B03599-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEA 121/5 Amdt 1 - Rudder Control Lever Assembly P/N BE 45.10193","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 B121 (Pup) Series Aeroplanes\n\n \n\nAD/BEA 121/5\n\nAmdt 1\n\nApplicability: All models.\n\n\nRudder Control Lever Assembly P/N BE 45.10193\n\n\n5/71\n\n \n\nRequirement: Action in accordance with Beagle SB B121/25.\n\n \n\nCompliance: 1. For aircraft not already inspected in accordance with AD/BEA 121/5, and, for those having more than 40 hours time in service since last inspected in accordance with AD/BEA 121/5 - within 10 hours time in service after 13 May 1971; and;\n\n \n\n2.    For aircraft having less than 40 hours time in service since last inspected in accordance with AD/BEA 121/5 - within 50 hours time in service from last inspection, and\n\n \n\n3.    Thereafter at intervals not exceeding 50 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","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"This entry is labelled \"Amdt 1\" to AD/BEA 121/5, indicating it amends the earlier AD. The amendment retains applicability to all Beagle B121 models and makes mandatory the actions described in Beagle SB B121/25, with the compliance timing rules stated in Compliance items 1–3. The instrument therefore modifies the prior AD framework by specifying (or reiterating) the compliance schedule and cross-referencing the Service Bulletin as the required action (see header: \"Amdt 1\"; \"Requirement\"; \"Compliance\")."},"complexity_factors":["Cross-reference to an external Service Bulletin (Beagle SB B121/25) for the substantive technical steps, requiring readers to obtain and follow that separate document (Requirement).","Conditional compliance timing with two alternative initial deadlines depending on whether more than 40 hours have elapsed since the last inspection under AD/BEA 121/5 (Compliance items 1–2).","A historical fixed deadline (within 10 hours after 13 May 1971) creates a one-off forced short window for some aircraft (Compliance item 1).","Recurring mandatory inspections at intervals not exceeding 50 hours time in service introduce an ongoing monitoring and record-keeping obligation (Compliance item 3).","The text is terse and uses aviation-specific terms like \"time in service\" and a part number, which requires domain knowledge to implement correctly."],"plain_english_summary":"This airworthiness directive makes Beagle Service Bulletin B121/25 mandatory for all Beagle B121 (Pup) aeroplanes, requiring inspection and any corrective work on Rudder Control Lever Assembly P/N BE 45.10193. It sets short initial deadlines based on prior inspections and requires repeat checks at regular intervals (not exceeding 50 hours TIS).\n\nOwners/operators must obtain and follow the Service Bulletin, bearing the inspection and repair costs and meeting the ongoing maintenance and scheduling burden."},"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 the original safety issue regarding the rudder control lever assembly in Beagle B121 aircraft. The amendment appears to clarify or adjust compliance timeframes without expanding the directive's coverage to additional aircraft types, parts, or operational requirements."},"complexity_factors":["Single, specific aircraft type and part number","Only 3 compliance conditions with clear time-in-service triggers","No defined terms section","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998 and one manufacturer service bulletin","Straightforward temporal logic (hours flown since last inspection)","Document appears to be a scanned or converted technical directive with significant whitespace/formatting artifacts but simple substantive content"],"plain_english_summary":"This is an **Airworthiness Directive** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of **Beagle B121 (Pup) series aeroplanes** to inspect or replace a specific part — the **Rudder Control Lever Assembly** (part number BE 45.10193). This part controls the rudder, which is the vertical flap on the tail that steers the aircraft left and right.\n\n**Who must follow it:**\nAnyone who owns or operates any model of the Beagle B121 Pup aircraft.\n\n**What they must do:**\nFollow the instructions in **Beagle Service Bulletin B121/25** (a technical notice from the aircraft manufacturer).\n\n**When they must do it:**\n- If the aircraft hasn't been inspected under the previous version of this directive, or if it has flown more than 40 hours since its last inspection: **within 10 flying hours after 13 May 1971**\n- If it has flown less than 40 hours since the last inspection: **within 50 flying hours from that last inspection**\n- After that: **repeat the inspection every 50 flying hours**\n\n**Why it matters:**\nThis directive prevents potential rudder control failures that could cause loss of aircraft control. The repetitive 50-hour inspection cycle suggests this component was prone to wear or fatigue and needed regular monitoring to keep the aircraft safe to fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bea-121-5-amdt-1-rudder-control-lever-assembly-p-n-be-45-10193","history":"/api/acts/ad-bea-121-5-amdt-1-rudder-control-lever-assembly-p-n-be-45-10193/history","analysis":"/api/acts/ad-bea-121-5-amdt-1-rudder-control-lever-assembly-p-n-be-45-10193/analysis","conflicts":"/api/acts/ad-bea-121-5-amdt-1-rudder-control-lever-assembly-p-n-be-45-10193/conflicts","importantCases":"/api/acts/ad-bea-121-5-amdt-1-rudder-control-lever-assembly-p-n-be-45-10193/important-cases","documents":"/api/acts/ad-bea-121-5-amdt-1-rudder-control-lever-assembly-p-n-be-45-10193/documents"}}