{"id":"F2006B03571","name":"AD/BEA 109/1 - Cooling Duct for Starboard Magneto","slug":"ad-bea-109-1-cooling-duct-for-starboard-magneto","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43138,"registerId":"commonwealth-F2006B03571-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEA 109/1 - Cooling Duct for Starboard Magneto","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 A109 (Airedale) Series Aeroplanes\n\n \n\nAD/BEA 109/1 Cooling Duct for Starboard Magneto 11/67\n\nApplicability: All models.\n\n \n\nRequirement: Action in accordance with Beagle - Auster Mod. No. A105. Compliance: 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\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument itself does not indicate any change from a prior scope or different intent. It applies to all Beagle A109 (Airedale) models and mandates the specified modification immediately (see \"Applicability: All models\", \"Requirement: Action in accordance with Beagle - Auster Mod. No. A105\", and \"Compliance: Forthwith\"). No text in the AD suggests an expansion or narrowing of scope relative to an earlier stated intent."},"complexity_factors":["Single, narrowly defined required action (install cooling duct) referenced in the AD (\"Requirement: Action in accordance with Beagle - Auster Mod. No. A105\").","Applicability is broad but simple: applies to all models (\"Applicability: All models\").","Compliance timeframe is immediate (\"Compliance: Forthwith\"), which raises operational urgency but not legal ambiguity.","The AD depends on an external technical document (Beagle - Auster Mod. No. A105) for implementation details, creating a reliance on an outside source for the how-to.","The AD text contains no alternative compliance pathways, exemptions, or staged deadlines, reducing procedural complexity but increasing practical scheduling pressure."],"plain_english_summary":"The directive mandates immediate installation of a cooling duct for the starboard magneto on all Beagle A109/Airedale aircraft by following Beagle - Auster Mod. No. A105. Owners/operators must arrange and fund the modification forthwith to keep aircraft airworthy, likely causing short-term downtime and relying on the external mod document and qualified maintenance providers."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue safety directive from 1967 (indicated by '11/67' in the reference). It has not expanded beyond its original narrow purpose of addressing a specific magneto cooling defect in one aircraft type. Airworthiness Directives are inherently narrow instruments — they fix specific unsafe conditions in specific aircraft types."},"complexity_factors":["Extremely short — only 4 substantive lines of requirements","Single, unambiguous action required (install cooling duct per specified modification)","No defined terms section, no cross-references to other legislation","One external reference to manufacturer modification document (Mod. No. A105)","No conditional logic, exceptions, or nested provisions","Straightforward applicability ('All models') with no carve-outs"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nOrders owners and operators of **Beagle A109 (Airedale) series aeroplanes** to immediately install a cooling duct for the starboard (right-hand) magneto. A magneto is an old-school electrical generator that produces the spark for the engine — it gets hot, and without proper cooling, it can fail.\n\n**Who it affects:**\nAnyone who owns, operates, or maintains any model of the Beagle A109 (Airedale) aircraft.\n\n**Why it matters:**\nMagneto failure means engine failure. This directive fixes a design flaw before it causes an accident. The word \"Forthwith\" means **do it immediately** — no grace period.\n\n**The catch:**\nThe directive references \"Beagle - Auster Mod. No. A105\" — meaning you need to find that specific manufacturer's modification document to know exactly what to do. This is typical of aviation safety rules: the law points to the technical manual, and you need both to comply."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bea-109-1-cooling-duct-for-starboard-magneto","history":"/api/acts/ad-bea-109-1-cooling-duct-for-starboard-magneto/history","analysis":"/api/acts/ad-bea-109-1-cooling-duct-for-starboard-magneto/analysis","conflicts":"/api/acts/ad-bea-109-1-cooling-duct-for-starboard-magneto/conflicts","importantCases":"/api/acts/ad-bea-109-1-cooling-duct-for-starboard-magneto/important-cases","documents":"/api/acts/ad-bea-109-1-cooling-duct-for-starboard-magneto/documents"}}