{"id":"F2006B04223","name":"AD/BEECH 90/32 - Elevator Stop Bolts - Modification","slug":"ad-beech-90-32-elevator-stop-bolts-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43979,"registerId":"commonwealth-F2006B04223-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 90/32 - Elevator Stop Bolts - Modification","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 90 and 65-90 (King Air) Series Aeroplanes\n\n \n\nAD/BEECH 90/32 Elevator Stop Bolts - Modification 9/74\n\nApplicability: All models C90 with S/Nos. LJ-552 to LJ-588. All models E90 with s/Nos. LW-1 to LW-56.\n\n \n\nDocument: Beechcraft SI No. 0618-152.\n\n \n\nCompliance: Within 100 hours’ time in service after 30 September 1974.\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 supplied text contains a standalone airworthiness directive applying a modification to specified serial-numbered aircraft and sets a compliance deadline. The document does not include any comparison to an earlier or different scope, so there is no indication in the text that the scope has been changed from an original intent."},"complexity_factors":["Narrow, clearly defined applicability by explicit serial number ranges (Applicability)","Single, straightforward compliance action (modification of elevator stop bolts) referenced to an external Service Instruction (Document)","Short, specific compliance window measured in flight hours from a fixed anchor date (Compliance)","No procedural detail inside the AD itself — dependence on external technical document increases operational steps to obtain and follow that document (Document)","No stated alternatives, exemptions or enforcement details in the supplied text, which simplifies legal reading but shifts uncertainty to external enforcement and cost assessment"],"plain_english_summary":"This directive requires owners/operators of specified Beechcraft Model C90 and E90 aeroplanes to modify elevator stop bolts per Beechcraft Service Instruction No. 0618-152, within 100 hours’ time‑in‑service after 30 September 1974. Compliance (parts, labour, scheduling) is the operator’s responsibility; the AD delegates the technical method to the external Service Instruction. The instrument does not state a safety rationale, cost estimates, enforcement or exemption procedures in the provided text."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-purpose airworthiness directive from 1974. It has not expanded beyond its original narrow scope of requiring a specific mechanical modification to specific aircraft serial numbers."},"complexity_factors":["Extremely short document (under 200 words)","Only 2 defined applicability criteria (serial number ranges for two aircraft models)","Single compliance requirement with clear deadline","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","No conditional logic, exceptions, or nested provisions","References only one external technical document (Beechcraft Service Instruction)"],"plain_english_summary":"This is an **Airworthiness Directive** (AD) — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires specific repairs or modifications to aircraft.\n\n**What it does:**\n- Requires owners and operators of certain **Beechcraft King Air aeroplanes** to modify the **elevator stop bolts** — mechanical components that limit how far the elevator (the control surface that makes the plane pitch up and down) can move.\n\n**Who it affects:**\n- Owners and operators of:\n  - **Model C90** King Air aircraft with serial numbers LJ-552 through LJ-588\n  - **Model E90** King Air aircraft with serial numbers LW-1 through LW-56\n\n**What must be done:**\n- The modification must be carried out following **Beechcraft Service Instruction No. 0618-152** (the manufacturer's official repair guidance).\n- **Deadline:** Within 100 hours of flying time after 30 September 1974.\n\n**Why it matters:**\nElevator stop bolts are critical safety components. If they fail or are incorrectly installed, pilots could lose control of the aircraft's pitch, potentially leading to loss of control accidents. This AD addresses a known safety defect identified by the manufacturer."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-90-32-elevator-stop-bolts-modification","history":"/api/acts/ad-beech-90-32-elevator-stop-bolts-modification/history","analysis":"/api/acts/ad-beech-90-32-elevator-stop-bolts-modification/analysis","conflicts":"/api/acts/ad-beech-90-32-elevator-stop-bolts-modification/conflicts","importantCases":"/api/acts/ad-beech-90-32-elevator-stop-bolts-modification/important-cases","documents":"/api/acts/ad-beech-90-32-elevator-stop-bolts-modification/documents"}}