{"id":"F2006B04052","name":"AD/BEECH 56/21 - Control Surface Trim Tab Systems","slug":"ad-beech-56-21-control-surface-trim-tab-systems","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43673,"registerId":"commonwealth-F2006B04052-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 56/21 - Control Surface Trim Tab Systems","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 56TC (Turbo Baron) Series Aeroplanes\n\n \n\nAD/BEECH 56/21 Control Surface Trim Tab Systems 6/80\n\nApplicability: All models 56TC and A56TC with S/Nos. TG-2 to TG-94. Requirement:  Action in accordance with Beechcraft SI No. 0846-152, Rev. 2.\n\nCompliance: Within 100 hours’ time in service after 30 June 1980 and thereafter at intervals not exceeding 100 hours’ time in service.\n\n \n\nBackground:  The inspection procedure defines maximum allowable control surface trim tab free play caused by accumulative wear in control linkage and actuators.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2305},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a specific airworthiness directive issued in 1980 addressing a defined safety issue with control surface trim tab wear on specific Beechcraft models. The scope remains targeted at the original safety concern without expansion into unrelated areas."},"complexity_factors":["Single requirement referencing external technical standard rather than detailing procedure","Limited applicability to specific aircraft models and serial number range (TG-2 to TG-94)","Simple recurring compliance interval (every 100 hours time in service)","No conditional logic, exceptions, or nested definitions"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Beechcraft 56TC and A56TC Turbo Baron aircraft (serials TG-2 through TG-94) to inspect the control surface trim tab systems per Beechcraft Service Instruction No. 0846-152, Revision 2. Inspections start within 100 flight hours after 30 June 1980 and repeat every 100 hours to detect wear/free play that could degrade control and ensure continued flight safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-56-21-control-surface-trim-tab-systems","history":"/api/acts/ad-beech-56-21-control-surface-trim-tab-systems/history","analysis":"/api/acts/ad-beech-56-21-control-surface-trim-tab-systems/analysis","conflicts":"/api/acts/ad-beech-56-21-control-surface-trim-tab-systems/conflicts","importantCases":"/api/acts/ad-beech-56-21-control-surface-trim-tab-systems/important-cases","documents":"/api/acts/ad-beech-56-21-control-surface-trim-tab-systems/documents"}}