{"id":"F2006B03613","name":"AD/BEECH 18/1 - Starter Solenoid and Main Bus Lead Wire - Inspection","slug":"ad-beech-18-1-starter-solenoid-and-main-bus-lead-wire-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43204,"registerId":"commonwealth-F2006B03613-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 18/1 - Starter Solenoid and Main Bus Lead Wire - 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)  Beechcraft 18 Series Aeroplanes\n\n \n\nAD/BEECH 18/1 Starter Solenoid and Main Bus NK\n\nLead Wire - Inspection\n\n \n\nApplicability: Model C-18S and AT-11. Document:  1. Beechcraft SB No. C18-5; or\n\n2. FAA AD 47-6-8; or 3. ANO 105.1.4.3.6.1.\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 from 1947 (FAA AD 47-6-8) adopted into Australian law. It has not expanded beyond its original narrow purpose of addressing a specific electrical defect in two Beechcraft models."},"complexity_factors":["Extremely short document — only 8 substantive lines","No defined terms section — all terminology is standard aviation maintenance language","No conditional logic or nested exceptions — single straightforward requirement","Minimal cross-referencing — only three external technical documents cited","No procedural steps detailed within the instrument itself — compliance achieved by reference to external standards"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) for specific Beechcraft aeroplanes.\n\n**What it does:**\nOrders an urgent safety inspection of the **starter solenoid** (an electrical switch that controls the engine starter motor) and the **main bus lead wire** (a thick electrical cable that carries power from the aircraft's main electrical system).\n\n**Who it affects:**\nOwners and operators of **Beechcraft Model C-18S and AT-11** aeroplanes — these are vintage twin-engine aircraft originally built in the 1940s-1950s, often used for training, transport, or heritage flying today.\n\n**Why it matters:**\nFaulty starter solenoids or damaged main bus wiring can cause **electrical fires, engine starting failures, or loss of electrical power** in flight. The directive requires compliance \"forthwith\" — meaning immediately, without delay.\n\n**What operators must do:**\nFollow one of three referenced technical documents to inspect and fix any problems:\n- Beechcraft Service Bulletin C18-5, or\n- FAA Airworthiness Directive 47-6-8 (the original US safety order), or\n- Australian National Order 105.1.4.3.6.1\n\nThis is a **mandatory safety order** — operators cannot legally fly these aircraft until they comply."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The supplied text sets a clear, narrow scope: an immediate inspection requirement for the starter solenoid and main bus lead wire on Beechcraft Model C-18S and AT-11 aircraft and directs operators to specific documents for procedures (Applicability; Document list; Compliance: Forthwith). There is no indication in the excerpt that the scope has been expanded or reduced relative to its own stated terms, and no alternative or superseding scope is provided in the text."},"complexity_factors":["Narrow applicability (only Model C-18S and AT-11) reduces breadth of affected parties.","Directive is short and prescriptive (requires inspection), lowering procedural complexity at the AD level.","Reliance on three external documents for procedural detail increases execution complexity because operators must obtain and follow those documents exactly.","Ambiguous timing term “Forthwith” creates some uncertainty about scheduling and operational impact.","Absence of detail in the AD about corrective actions or follow-up requirements forces cross‑referencing to other instruments, adding administrative steps."],"plain_english_summary":"This directive requires owners/operators of Beechcraft Model C‑18S and AT‑11 aircraft to carry out an immediate inspection of the starter solenoid and main bus lead, to be performed in accordance with one of the three referenced documents (Beechcraft SB C18‑5, FAA AD 47‑6‑8, or ANO 105.1.4.3.6.1).  \n\nIssued under CASA (Part 39), compliance is mandatory “forthwith”; the text itself does not state who pays or the detailed inspection steps."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-18-1-starter-solenoid-and-main-bus-lead-wire-inspection","history":"/api/acts/ad-beech-18-1-starter-solenoid-and-main-bus-lead-wire-inspection/history","analysis":"/api/acts/ad-beech-18-1-starter-solenoid-and-main-bus-lead-wire-inspection/analysis","conflicts":"/api/acts/ad-beech-18-1-starter-solenoid-and-main-bus-lead-wire-inspection/conflicts","importantCases":"/api/acts/ad-beech-18-1-starter-solenoid-and-main-bus-lead-wire-inspection/important-cases","documents":"/api/acts/ad-beech-18-1-starter-solenoid-and-main-bus-lead-wire-inspection/documents"}}