{"id":"F2006B03750","name":"AD/BEECH 23/36 - Stabilator Trim Tab Actuator Rod","slug":"ad-beech-23-36-stabilator-trim-tab-actuator-rod","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43344,"registerId":"commonwealth-F2006B03750-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 23/36 - Stabilator Trim Tab Actuator Rod","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 23/36 Stabilator Trim Tab Actuator Rod 8/78\n\nApplicability: Models B19 with S/Nos. MB-558 through MB-886.\n\n \n\nModels C23 with S/Nos. M-1413, M-1414, M-1416 to M-1418, M-1420 to M-1422, M-1424 to M-1438, M-1440 to M-1446, M-1448 to M-2009, M-2011 to M-2015, M-2017 to M-2020.\n\n \n\nModels B24R and C24R with S/Nos. MC-151 to MC-559, MC-561 to MC-563, MC-565 to MC-568, MC-571.\n\n \n\nRequirement: Action in accordance with Beechcraft SI No. 0994. Compliance:  Within 25 hours time in service after 3 July 1978.\n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The text shows a targeted directive applying to specific airframes (see \"Applicability\") and prescribes a single action (see \"Requirement\") within a fixed deadline (see \"Compliance\"). The instrument itself contains no indication that its scope was altered from an earlier version; based on the supplied text there is no evidence the scope has changed from its stated content."},"complexity_factors":["Narrow, specific applicability limited to named models and serial numbers (Applicability).","Single mandated action: compliance with an external Beechcraft Service Instruction (Requirement), rather than multiple regulatory steps.","Short, fixed compliance window (25 hours time in service after 3 July 1978) increases operational scheduling pressure (Compliance).","Dependence on an external document (Beechcraft SI No. 0994) requires obtaining and interpreting manufacturer instructions.","Practical compliance requires sourcing parts and qualified maintenance personnel, introducing logistical complexity despite simple legal text."],"plain_english_summary":"This Commonwealth Airworthiness Directive mandates that owners/operators of the specified Beechcraft aeroplanes (listed by model and serial number) must carry out the action in Beechcraft Service Instruction No. 0994 concerning the stabilator trim tab actuator rod.  \n\nThe work must be completed within 25 hours time in service after 3 July 1978; affected owners/operators bear the cost and scheduling burden to comply."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive issued in 1978. It has not grown beyond its original purpose — it addresses one specific mechanical defect in specific aircraft models and requires one specific action. The scope remains precisely as intended: targeted, limited, and non-expanding."},"complexity_factors":["Very short document (under 200 words)","No defined terms section — all language is plain technical aviation terminology","No cross-references to other legislation (only references external manufacturer document SI No. 0994)","Simple conditional structure: if you own these specific serial numbers, you must do this specific action by this deadline","Single requirement with single compliance timeframe — no nested exceptions or alternative compliance methods"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of certain **Beechcraft aeroplanes** to inspect or fix a problem with the **stabilator trim tab actuator rod** — a mechanical component that helps control the aircraft's pitch (nose up/down movement).\n\n**Who it affects:**\n- **Beechcraft Model B19** (serial numbers MB-558 through MB-886)\n- **Beechcraft Model C23** (specific serial numbers listed — roughly 600+ aircraft)\n- **Beechcraft Models B24R and C24R** (serial numbers MC-151 through MC-571, with some gaps)\n\n**What must be done:**\nFollow the instructions in **Beechcraft Service Instruction No. 0994** — a technical document from the manufacturer detailing the required inspection or repair.\n\n**When:**\nWithin **25 hours of flight time** after **3 July 1978**.\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety orders. If you don't comply, you cannot legally fly the aircraft. This particular AD addresses a potential defect in the trim tab system that could affect flight control — a serious safety issue."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-23-36-stabilator-trim-tab-actuator-rod","history":"/api/acts/ad-beech-23-36-stabilator-trim-tab-actuator-rod/history","analysis":"/api/acts/ad-beech-23-36-stabilator-trim-tab-actuator-rod/analysis","conflicts":"/api/acts/ad-beech-23-36-stabilator-trim-tab-actuator-rod/conflicts","importantCases":"/api/acts/ad-beech-23-36-stabilator-trim-tab-actuator-rod/important-cases","documents":"/api/acts/ad-beech-23-36-stabilator-trim-tab-actuator-rod/documents"}}