{"id":"F2006B09470","name":"AD/EMB-110/29 - Flight Control Trim Tab Hinge Pins - Inspection and Replacement","slug":"ad-emb-110-29-flight-control-trim-tab-hinge-pins-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53948,"registerId":"commonwealth-F2006B09470-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/EMB-110/29 - Flight Control Trim Tab Hinge Pins - Inspection and Replacement","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\nAD/EMB-110/29  Flight Control Trim Tab Hinge Pins - Inspection and Replacement\n\n\n3/84\n\n \n\nApplicability: All model EMB-110 with S/Nos 110001 to 110386, 110388 to 110397, 110399 to\n\n110401, 110404 to 110408, 110410 to 110412, 110414, 110415 and 110421.\n\n \n\nDocument: Embraer S.B. No 110-55-023.\n\n \n\nNote: Brazilian AD 83-11-01 refers.\n\n \n\nCompliance: 1. Inspect within 25 hours time in service after 26th January 1984 and thereafter at intervals not exceeding 25 hours time in service until modified.\n\n \n\n2. Modify prior to 30 April 1984.\n\n \n\nBackground: The manufacturer reports migration of an elevator trim tab hinge pin.\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\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive’s scope, as expressed in the supplied text, is limited to the listed EMB-110 serial numbers and prescribes inspection and modification requirements tied to a specific safety report (migration of an elevator trim tab hinge pin). The instrument does not indicate any expansion or narrowing of that scope from an earlier or different intent within the text provided."},"complexity_factors":["Narrow applicability limited to a specific list of serial numbers (Applicability)","Very short recurring inspection interval (every 25 hours time in service) until modification (Compliance: 1)","A firm calendar deadline for modification (before 30 April 1984) that compresses scheduling (Compliance: 2)","Dependence on an external technical document (Embraer S.B. No. 110-55-023) for the method of compliance (Document)","Reference to a foreign airworthiness directive (Brazilian AD 83-11-01), requiring operators to track multiple regulatory sources (Note)"],"plain_english_summary":"This AD, issued by CASA for specified Embraer EMB‑110 (Bandeirante) aircraft, mandates immediate and repeated inspections of the elevator trim‑tab hinge pins every 25 flight hours until a required modification is installed, which must be completed by 30 April 1984. Prompted by reported hinge‑pin migration, it creates binding obligations (and costs) for owners/operators to follow Embraer Service Bulletin No. 110‑55‑023 to comply."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive addressing a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of mandating inspection and replacement of trim tab hinge pins."},"complexity_factors":["Very short document (approximately 200 words)","Only 3 defined elements: applicability (serial numbers), compliance deadlines, and reference document","No cross-references to other legislation beyond a single note about a Brazilian AD","Simple conditional logic: inspect first, then modify by fixed deadline","Single technical issue addressed with clear sequential steps","No exceptions, exemptions, or nested conditions"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:** It requires owners and operators of certain Embraer EMB-110 Bandeirante aircraft to inspect and replace elevator trim tab hinge pins. These are small metal parts that help control the aircraft's pitch (nose up/down movement).\n\n**Who it affects:** Owners and operators of Embraer EMB-110 aircraft with specific serial numbers (roughly serial numbers 110001 through 110421, with some gaps).\n\n**What must be done:**\n- **Inspection:** Check the hinge pins within 25 flight hours after 26 January 1984, then re-check every 25 flight hours until the modification is done\n- **Modification:** Permanently fix the problem before 30 April 1984\n\n**Why it matters:** The manufacturer found that hinge pins could \"migrate\" (move out of position). If a hinge pin comes loose, the pilot could lose control of the aircraft's pitch, potentially causing a crash. This AD prevents that failure.\n\n**Key terms:**\n- **Airworthiness Directive (AD):** A legally binding safety order that must be followed to keep an aircraft airworthy (legal to fly)\n- **Time in service:** Actual flight hours (not calendar time)\n- **S.B. (Service Bulletin):** Manufacturer's technical instructions for fixing a problem"}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-110-29-flight-control-trim-tab-hinge-pins-inspection-and-replacement","history":"/api/acts/ad-emb-110-29-flight-control-trim-tab-hinge-pins-inspection-and-replacement/history","analysis":"/api/acts/ad-emb-110-29-flight-control-trim-tab-hinge-pins-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-emb-110-29-flight-control-trim-tab-hinge-pins-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-emb-110-29-flight-control-trim-tab-hinge-pins-inspection-and-replacement/important-cases","documents":"/api/acts/ad-emb-110-29-flight-control-trim-tab-hinge-pins-inspection-and-replacement/documents"}}