{"id":"F2006B09469","name":"AD/EMB-110/28 Amdt 2 - Control Surfaces - Static Balance","slug":"ad-emb-110-28-amdt-2-control-surfaces-static-balance","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53944,"registerId":"commonwealth-F2006B09469-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/EMB-110/28 Amdt 2 - Control Surfaces - Static Balance","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-110/28\n\nAmdt 2\n\nApplicability: All models.\n\n# Control Surfaces - Static Balance 10/83\n\n \n\nDocument: Embraer S.B. No. 110-55-021.\n\n \n\nNote: Brazilian AD 83-05-03R2 refers.\n\n \n\nCompliance: Unless already accomplished, within 500 hours time in service after 31st July 1983.\n\n \n\nBackground: Amdt 2 of AD/EMB110/28 is issued to reflect revision 2 of Brazilian AD 83-05-03 which increases some maximum mass balance weight values to achieve static balance.\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":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"Amdt 2 updates the technical limits used for static balancing by increasing some maximum mass balance weight values and implements that revision by directing compliance with Embraer Service Bulletin No. 110-55-021 (Background; Document). The AD therefore changes the previous technical parameters to the revised values and requires operators to accomplish the work within the stated compliance window (Compliance)."},"complexity_factors":["Short, narrowly focused directive addressing a single technical topic (control-surface static balance).","Clear, single compliance deadline (500 hours TIS after 31 July 1983).","Technical procedures and exact weight values are delegated to an external service bulletin and a referenced foreign AD (Document; Note), requiring implementers to consult other documents.","No alternative compliance methods, exemptions, or enforcement details included in the text (Compliance).","Applies to all models of one aircraft type (Applicability) — broad applicability but limited technical scope."],"plain_english_summary":"This instrument is an Airworthiness Directive (AD/EMB-110/28 Amdt 2) that tells operators of Embraer EMB-110 (Bandeirante) aeroplanes what technical action they must take to ensure the aircraft control surfaces are statically balanced. Mechanically, the AD requires the actions described in Embraer Service Bulletin No. 110-55-021 and updates the allowable mass-balance weights used to achieve static balance: Amdt 2 reflects revision 2 of Brazilian AD 83-05-03 which increases some maximum mass balance weight values (Background; Document; Note).\n\nKey mechanics\n\n- Who it applies to: all models of the Embraer EMB-110 series (Applicability).\n- What must be done: the AD directs compliance with the referenced Embraer service bulletin (Document).\n- Timing: unless already done, the required work must be completed within 500 hours time in service after 31 July 1983 (Compliance).\n- Relation to other instruments: the AD refers to Brazilian AD 83-05-03R2 (Note).\n\nWhy this matters (official rationale and implementation implications)\n\n- Official rationale: the amendment exists to implement the revision that increases certain maximum mass balance weights to achieve static balance (Background).\n- Who pays and who decides: the obligation to accomplish the work falls on operators/owners of EMB-110 aircraft because the AD applies to those aircraft and sets the compliance requirement (Applicability; Compliance). The AD text itself does not specify funding or compensation.\n- What is delegated: the AD delegates technical detail to the Embraer Service Bulletin and the referenced Brazilian AD; the AD text does not reproduce the full technical procedure (Document; Note). Implementers therefore must consult those documents to know exactly what tasks and weight values are required.\n- Compliance burden and timing: the AD imposes a single compliance window (500 hours TIS after 31 July 1983). The AD does not state alternative methods of compliance or exemptions in this text (Compliance).\n- Practical effects for operators: operators will need to schedule maintenance and perform the actions in the service bulletin within the stated time window; the AD does not list specific costs, parts or labour rates—those are operational costs borne by the operator (Compliance; Document).\n- Implementation risks and trade-offs: because the AD relies on an external service bulletin and a foreign AD for technical specifics, implementers must obtain and follow those documents; this creates coordination and interpretative tasks not described in the AD text (Document; Note).\n\nIn short: the AD updates the technical mass-balance limits for EMB-110 control surfaces and imposes a time-limited requirement on operators to accomplish the changes by following the referenced Embraer service bulletin (Applicability; Document; Compliance; Background; Note)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment remains tightly scoped to its original purpose: ensuring the static balance of control surfaces on a specific aircraft type. The amendment simply updates numerical values (maximum mass balance weights) to match revised Brazilian standards. There is no expansion into new aircraft systems, operational requirements, or regulatory domains."},"complexity_factors":["Very short document (approximately 250 words)","Only 1 defined applicability term ('All models')","No cross-references to other legislation or regulations beyond a single service bulletin reference","Single compliance condition with straightforward deadline calculation","No nested exceptions or conditional logic","Purpose is purely administrative — updating weight values in an existing safety directive"],"plain_english_summary":"**What this is:** 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:** It requires owners and operators of **Embraer EMB-110 Bandeirante aircraft** (a Brazilian-made twin-turboprop plane) to check and adjust the **static balance** of their **control surfaces** (the moving parts on wings and tail that steer the plane, like ailerons, elevators, and rudders).\n\n**Why it matters:** If control surfaces aren't properly balanced, they can flutter (vibrate uncontrollably) or become difficult to control — both of which can cause catastrophic failure in flight. This update (Amendment 2) increases the allowed weight limits for **mass balance weights** (small metal weights added to control surfaces to keep them stable) based on revised Brazilian safety standards.\n\n**Who must comply:** Anyone operating an Embraer EMB-110 of any model variant. The work had to be done within 500 flight hours after 31 July 1983 (unless already completed).\n\n**Key source:** The directive references Embraer Service Bulletin 110-55-021 and Brazilian aviation authority directive 83-05-03R2."}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-110-28-amdt-2-control-surfaces-static-balance","history":"/api/acts/ad-emb-110-28-amdt-2-control-surfaces-static-balance/history","analysis":"/api/acts/ad-emb-110-28-amdt-2-control-surfaces-static-balance/analysis","conflicts":"/api/acts/ad-emb-110-28-amdt-2-control-surfaces-static-balance/conflicts","importantCases":"/api/acts/ad-emb-110-28-amdt-2-control-surfaces-static-balance/important-cases","documents":"/api/acts/ad-emb-110-28-amdt-2-control-surfaces-static-balance/documents"}}