{"id":"F2006B03939","name":"AD/BEECH 50/15 - Elevator Trim Tab Hinge Beam","slug":"ad-beech-50-15-elevator-trim-tab-hinge-beam","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43548,"registerId":"commonwealth-F2006B03939-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 50/15 - Elevator Trim Tab Hinge Beam","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 12/1965,Aircraft below 5700 kg,Beechcraft 50 (Twin Bonanza) Series Aeroplanes,Elevator Trim Tab Hinge Beam,15\ntitle: Airworthiness Directive - AD/BEECH 50/15 - Elevator Trim Tab Hinge Beam\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 50 (Twin Bonanza) Series Aeroplanes\n\n \n\nAD/BEECH 50/15 Elevator Trim Tab Hinge Beam 12/65\n\nApplicability: All models.\n\n \n\nRequirement: Visually inspect the elevator trim tab hinge beam (P/N 50/610000/94) for cracking in the flange and web.\n\n \n\nCompliance: At intervals not exceeding 250 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","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused on a specific known defect in a specific aircraft type. It has not expanded beyond its original purpose of addressing elevator trim tab hinge beam cracking in Beechcraft 50 series aircraft."},"complexity_factors":["Extremely short document (approximately 100 words of substantive content)","Only 1 defined term implicitly used ('time in service' — standard aviation term)","No cross-references to other legislation or regulations","Simple unconditional requirement: inspect every 250 hours","Single applicability criterion (all models of one aircraft series)","No exceptions, exemptions, or conditional logic","Standard regulatory template format with minimal variation"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires aircraft owners and operators to take specific action to keep their planes safe.\n\n**What it does:**\n- Requires owners of **Beechcraft 50 (Twin Bonanza) series aeroplanes** to regularly check a specific part called the **elevator trim tab hinge beam** (part number 50/610000/94) for cracks.\n- The \"elevator trim tab\" is a small movable surface on the tail that helps control the plane's pitch (nose up or down). The \"hinge beam\" is the structural component that attaches this surface to the aircraft. If it cracks, the pilot could lose control of the aircraft's pitch.\n\n**Who it affects:**\n- Anyone who owns, operates, or maintains a Beechcraft 50 series aircraft (all models).\n\n**What must be done:**\n- A **visual inspection** (looking for cracks in the flange and web of the hinge beam) must be performed **every 250 hours of flight time** (\"time in service\" means actual flying hours, not time parked).\n\n**Why it matters:**\n- Cracks in this structural component could lead to failure of the elevator trim system, potentially causing loss of aircraft control. This directive prevents accidents by catching fatigue damage before it becomes critical."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive's scope, as stated in the document, applies to all models of the Beechcraft 50 series and mandates inspection of a single, specifically identified part (P/N 50/610000/94) at specified intervals. Nothing in the provided text expands or narrows that stated applicability or the single inspection requirement beyond the explicit terms (Applicability; Requirement; Compliance)."},"complexity_factors":["Single, discrete mandatory action (visual inspection of one specified part).","Clear compliance interval (every 250 hours time in service).","Broad applicability but narrow technical scope (applies to all models of the type but only one part and two areas of that part).","Low technical complexity of the mandated task (visual inspection) reduces procedural complexity.","Text does not specify inspection standards, acceptance criteria, remedial actions, or record-keeping requirements, which creates practical implementation ambiguity.","No alternative compliance pathways, exemptions, or special administrative steps included in the text."],"plain_english_summary":"Owners and operators of Beechcraft 50 (Twin Bonanza) series must perform recurring visual inspections of the elevator trim tab hinge beam (P/N 50/610000/94) to check for cracking in the flange and web, at intervals not exceeding 250 hours TIS. \n\nThe rule shifts inspection costs and scheduling onto operators; its primary aim is early detection of hinge-beam cracks to protect airworthiness, though it does not prescribe acceptance criteria or remedial actions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-50-15-elevator-trim-tab-hinge-beam","history":"/api/acts/ad-beech-50-15-elevator-trim-tab-hinge-beam/history","analysis":"/api/acts/ad-beech-50-15-elevator-trim-tab-hinge-beam/analysis","conflicts":"/api/acts/ad-beech-50-15-elevator-trim-tab-hinge-beam/conflicts","importantCases":"/api/acts/ad-beech-50-15-elevator-trim-tab-hinge-beam/important-cases","documents":"/api/acts/ad-beech-50-15-elevator-trim-tab-hinge-beam/documents"}}