{"id":"F2006B03743","name":"AD/BEECH 23/3 - Stabilator Hinge Assembly","slug":"ad-beech-23-3-stabilator-hinge-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43336,"registerId":"commonwealth-F2006B03743-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 23/3 - Stabilator Hinge Assembly","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 19, 23 and 24 Series Aeroplanes\n\n \n\nAD/BEECH 23/3 Stabilator Hinge Assembly 4/64\n\nApplicability: Model 23 only.\n\n \n\nRequirement: 1. Modify the attachment of the stabilator hinge to the fuselage to prevent cracking of the adjacent fuselage skin, doubler and frame, in accordance with a scheme approved by the Secretary.\n\n \n\n2. Beechcraft Service Instruction No. 64-22. Compliance: Before 1 September 1971.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1500},"content_quality":"ok","complexity_score":2,"rejection_reason":"","scope_assessment":{"changed":false,"description":"This Airworthiness Directive remains tightly focused on its original purpose: addressing a specific structural defect in the stabilator hinge assembly of Beechcraft Model 23 aircraft. There is no evidence the scope has expanded beyond this original safety intent."},"complexity_factors":["Single, narrow applicability clause (Model 23 only)","One primary requirement with straightforward technical reference to external standard (Beechcraft Service Instruction No. 64-22)","No conditional logic, exceptions, or nested definitions","Clear compliance deadline"],"plain_english_summary":"This is a **safety order** (called an Airworthiness Directive) for owners of specific Beechcraft aeroplanes.\n\n**Who it affects:** Owners of Beechcraft Model 23 aeroplanes only.\n\n**What it requires:** You must modify how the **stabilator** (the movable tail surface that controls whether the plane climbs or dives) connects to the fuselage. This modification prevents cracks from forming in the surrounding metal skin, reinforcement plates (called *doublers*), and frame.\n\n**How to comply:** Have the work done following a scheme approved by the Secretary (of the Department responsible for aviation), specifically using **Beechcraft Service Instruction No. 64-22** as your guide. This work should have been completed before 1 September 1971.\n\n**Why it matters:** If the hinge attachment cracks, the pilot could lose control of the aircraft's pitch, creating a serious crash risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-23-3-stabilator-hinge-assembly","history":"/api/acts/ad-beech-23-3-stabilator-hinge-assembly/history","analysis":"/api/acts/ad-beech-23-3-stabilator-hinge-assembly/analysis","conflicts":"/api/acts/ad-beech-23-3-stabilator-hinge-assembly/conflicts","importantCases":"/api/acts/ad-beech-23-3-stabilator-hinge-assembly/important-cases","documents":"/api/acts/ad-beech-23-3-stabilator-hinge-assembly/documents"}}