{"id":"F2006B09452","name":"AD/EMB-110/12 - Elevator Rear Bellcrank Bolts and Spring Supports - Replacement","slug":"ad-emb-110-12-elevator-rear-bellcrank-bolts-and-spring-supports-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53897,"registerId":"commonwealth-F2006B09452-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/EMB-110/12 - Elevator Rear Bellcrank Bolts and Spring Supports - 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-110/12 Elevator Rear Bellcrank Bolts and\n\nSpring Supports - Replacement\n\n\n2/81\n\n \n\nApplicability: All models 110 with S/Nos. 110001 to 110134, 110136, to 110139, 110143 to\n\n110146, 110148, 110149, 110152, 110156, 110157, 110160, 110161, 110164,\n\n110165, 110168, to 110170, 110172 to 110178, 110180, 110181, 110183, 110184,\n\n110186, 110189, 110190, and 110192 to 110252.\n\n \n\nDocument: Embraer SB No. 110-27-038.\n\n \n\nCompliance: Within 240 hours time in service after 28 February 1981.\n\n \n\nBackground: An instance has been reported overseas of a self locking nut working loose and separating from the elevator bellcrank bolt.\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\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1607},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive remains tightly scoped to its original purpose: addressing a specific mechanical defect (loose elevator bellcrank nuts) in designated aircraft models. There is no evidence of scope expansion beyond this discrete airworthiness safety issue."},"complexity_factors":["Single compliance action required","Specific, enumerated list of affected aircraft serial numbers with no ambiguity","No defined terms or interpretation sections","Direct incorporation of a single technical standard (Embraer Service Bulletin) for implementation details","No exceptions, conditional clauses, or nested legal tests"],"plain_english_summary":"**What this does:** This is a mandatory safety order (called an Airworthiness Directive) requiring the replacement of specific bolts and spring supports in the elevator control system of certain Embraer aircraft.\n\n**Who it affects:** Owners and operators of Embraer EMB-110 (Bandeirante) aircraft with specific serial numbers listed in the document (ranging from 110001 to 110252, with several gaps).\n\n**What must be done:** The elevator rear bellcrank bolts and spring supports must be replaced in accordance with Embraer Service Bulletin No. 110-27-038. This maintenance must be completed within 240 hours of flight time after 28 February 1981.\n\n**Why it matters:** There was a reported incident overseas where a self-locking nut worked loose and fell off an elevator bellcrank bolt. If this happens in flight, it could compromise the elevator — the control surface that makes the aircraft climb or descend — potentially leading to loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-110-12-elevator-rear-bellcrank-bolts-and-spring-supports-replacement","history":"/api/acts/ad-emb-110-12-elevator-rear-bellcrank-bolts-and-spring-supports-replacement/history","analysis":"/api/acts/ad-emb-110-12-elevator-rear-bellcrank-bolts-and-spring-supports-replacement/analysis","conflicts":"/api/acts/ad-emb-110-12-elevator-rear-bellcrank-bolts-and-spring-supports-replacement/conflicts","importantCases":"/api/acts/ad-emb-110-12-elevator-rear-bellcrank-bolts-and-spring-supports-replacement/important-cases","documents":"/api/acts/ad-emb-110-12-elevator-rear-bellcrank-bolts-and-spring-supports-replacement/documents"}}