{"id":"F2006B09451","name":"AD/EMB-110/11 - Elevator Trim Tab and Tail Cone Clearance - Inspection","slug":"ad-emb-110-11-elevator-trim-tab-and-tail-cone-clearance-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53894,"registerId":"commonwealth-F2006B09451-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/EMB-110/11 - Elevator Trim Tab and Tail Cone Clearance - Inspection","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)  Embraer EMB-110 (Bandeirante) Series Aeroplanes\n\n \n\n# AD/EMB-110/11  Elevator Trim Tab and Tail Cone Clearance - Inspection\n\nApplicability: All model EMB-110 with S/Nos. 110001 to 110226.\n\n# 10/80\n\n \n\nRequirement: 1. Inspect for the existing clearance between the elevator trim tab and the tail cone in all possible deflections of the elevator and trim tab. This clearance must be 5mm or more at the hinge line and 10mm or more at the trim tab trailing edge.\n\n \n\n2. If the clearance is less than those noted in paragraph 1. Modify the trim tab to obtain the necessary clearances.\n\n \n\nNote 1: Rivet edge distance of 5mm must be maintained during modification.\n\n \n\nNote 2: If clearances noted cannot be obtained and rivet edge distance maintained, contact manufacturer for suitable modification scheme.\n\n \n\nNote 3: Brazilian AD 80-07-03 refers.\n\n \n\nCompliance: Within 120 hours time in service after 31 October 1980 and there- after at any time the trim tab or tail cone is replaced.\n\n \n\nBackground: It is possible for interference to occur between the elevator trim tab and the tail cone.\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_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1980 addressing a specific mechanical clearance problem. It has not expanded beyond its original purpose of ensuring safe clearance between the elevator trim tab and tail cone on affected Embraer aircraft."},"complexity_factors":["Very short document (under 300 words)","Only 2 substantive requirements with clear numerical thresholds (5mm, 10mm, 120 hours)","Minimal defined terms (only standard aviation abbreviations like S/Nos.)","No cross-references to other legislation sections (only a reference to a Brazilian AD for context)","Simple conditional logic: inspect → if insufficient, modify → if modification impossible, contact manufacturer","Single applicability criterion (serial number range)","No nested exceptions or complex compliance calculations"],"plain_english_summary":"This CASA Airworthiness Directive mandates owners/operators of Embraer EMB-110 serials 110001–110226 to inspect and ensure minimum clearances between the elevator trim tab and tail cone (preventing interference that could jam controls). If clearances are insufficient, modify the trim tab per the AD while maintaining rivet-edge limits, or obtain an approved repair from Embraer. It affects early EMB-110s in Australia and addresses a serious flight-safety hazard."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive as written applies to the expressly listed EMB‑110 serial numbers and mandates inspection and modification measures; the text shows no alteration or expansion of that applicability or requirements compared with its stated purpose. It confines decision-making to operators (who must inspect/modify within the prescribed time and when parts are replaced) and to the manufacturer when a compliant modification scheme cannot be achieved (Requirement; Notes 1–2; Compliance)."},"complexity_factors":["Technical measurements and tolerances specified (5 mm at hinge line; 10 mm at trailing edge) increase precision requirements","Applicability limited to a specific serial number range (S/N 110001–110226) which requires record checks","Mandated modification where clearances are insufficient (mechanical work, possible parts or labour costs)","Maintenance constraint to maintain 5 mm rivet edge distance during modification (Note 1 adds design constraint)","Requirement for operator to contact manufacturer if tolerances cannot be met introduces an approval/engineering interface (Note 2)","Compliance timing: a short initial compliance window (120 hours after 31 Oct 1980) and recurring trigger when parts are replaced","Potential inspection scope includes checking all elevator and trim tab deflections (operational/test complexity)"],"plain_english_summary":"This airworthiness directive requires operators of Embraer EMB‑110 aircraft (S/N 110001–110226) to inspect the clearance between the elevator trim tab and the tail cone and to modify the trim tab if clearances are below the specified minimums (≥5 mm at the hinge line; ≥10 mm at the trailing edge). A 5 mm rivet edge distance must be maintained; contact the manufacturer if the clearance cannot be achieved (Requirement; Notes 1–2). Inspections and any modifications must be done within 120 hours time in service after 31 October 1980 and thereafter when the trim tab or tail cone is replaced (Compliance). Operators bear the inspection and modification costs; the manufacturer may provide modification schemes (Note 2)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-110-11-elevator-trim-tab-and-tail-cone-clearance-inspection","history":"/api/acts/ad-emb-110-11-elevator-trim-tab-and-tail-cone-clearance-inspection/history","analysis":"/api/acts/ad-emb-110-11-elevator-trim-tab-and-tail-cone-clearance-inspection/analysis","conflicts":"/api/acts/ad-emb-110-11-elevator-trim-tab-and-tail-cone-clearance-inspection/conflicts","importantCases":"/api/acts/ad-emb-110-11-elevator-trim-tab-and-tail-cone-clearance-inspection/important-cases","documents":"/api/acts/ad-emb-110-11-elevator-trim-tab-and-tail-cone-clearance-inspection/documents"}}