{"id":"F2006B09480","name":"AD/EMB-110/40 Amdt 2 - Flap Control Switch","slug":"ad-emb-110-40-amdt-2-flap-control-switch","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53990,"registerId":"commonwealth-F2006B09480-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/EMB-110/40 Amdt 2 - Flap Control Switch","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-110/40\n\nAmdt 2\n\n\nFlap Control Switch 8/89\n\n \n\nApplicability: All EMB-110 aircraft serial number 110001 through 110467 inclusive. Requirement:  Action in accordance with Embraer SB 110-027-0084 Revision 1.\n\nNote: Brazilian AD 88-09-01 Revision 1 also refers.\n\n \n\nCompliance: Prior to 2 November 1989.\n\n \n\nBackground: Embraer have advised that chafing between the attaching screws of the flap control switch potentiometer and resistor R273 can cause inadvertent flap extension.\n\n \n\nAmendment 1 to this AD was issued to reflect an addition to the applicable part numbers in the Requirement documents.\n\n \n\nAmendment 2 to this Directive is issued to amend the Requirement Document.\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":true,"description":"Amendment 2 changes the Requirement Document for complying with the directive rather than altering which aircraft are covered. Amendment 1 previously added part numbers; Amendment 2 'is issued to amend the Requirement Document' (source text). The serial-number applicability remains the same, but the specific corrective-action document and part references were modified."},"complexity_factors":["Narrow, clear applicability (specific serial range): 'Applicability: All EMB-110 aircraft serial number 110001 through 110467 inclusive.'","External technical action required by an aircraft manufacturer service bulletin: 'Requirement: Action in accordance with Embraer SB 110-027-0084 Revision 1.'","Firm compliance deadline imposes scheduling and operational cost: 'Compliance: Prior to 2 November 1989.'","Safety-critical technical cause requiring mechanical work on flight control circuitry: 'Background: Embraer have advised that chafing between the attaching screws of the flap control switch potentiometer and resistor R273 can cause inadvertent flap extension.'","Document-change complexity from amendments (part numbers and requirement document updates): 'Amendment 1 ... addition to the applicable part numbers' and 'Amendment 2 ... is issued to amend the Requirement Document.'","Regulatory provenance and cross-reference to a foreign AD requiring confirmatory checks: header referencing Civil Aviation Safety Authority and 'Note: Brazilian AD 88-09-01 Revision 1 also refers.'"],"plain_english_summary":"This airworthiness directive requires operators of Embraer EMB‑110 aeroplanes (serials 110001–110467) to carry out the corrective action in Embraer Service Bulletin SB 110‑027‑0084 Revision 1 before 2 November 1989. It addresses chafing between the flap control switch potentiometer screws and resistor R273 that can cause inadvertent flap extension.\n\nOperators must implement the service bulletin at their own cost; the Civil Aviation Safety Authority mandates compliance and has issued two amendments to update part numbers and the required service document."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD has remained tightly focused on its original purpose: fixing a specific flap control switch defect in specific Embraer aircraft. The two amendments merely refined the technical documentation (adding part numbers, updating the requirement document) without expanding the scope to other aircraft systems or types."},"complexity_factors":["Very short document (under 200 words)","Only 2 defined elements: specific aircraft serial number range and one service bulletin reference","Single, unambiguous compliance requirement","No nested conditions or exceptions","No cross-references to other legislation beyond a single note about a Brazilian AD","Straightforward cause-and-effect: identified defect → mandatory fix → deadline"],"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). Think of it like a recall notice for aircraft, but legally binding.\n\n**What it does:** It requires owners and operators of specific Embraer EMB-110 \"Bandeirante\" aircraft (serial numbers 110001 through 110467) to carry out a safety fix. The fix involves following instructions in an Embraer Service Bulletin (SB 110-027-0084 Revision 1) to address a dangerous electrical problem.\n\n**The safety problem:** The flap control switch — which controls the wing flaps that help planes slow down for landing — can suffer from **chafing** (wear caused by rubbing) between screws and a resistor. This wear can cause the flaps to extend unexpectedly during flight, which is a serious safety hazard.\n\n**Who must act:** Anyone operating these specific Embraer aircraft in Australia.\n\n**When they had to act:** Before 2 November 1989 (this is a historical directive).\n\n**Why it matters:** Unexpected flap extension can dangerously alter aircraft performance, potentially leading to loss of control. This AD ensures a known defect gets fixed before it causes an accident.\n\n**The amendments:** \n- **Amendment 1** added more part numbers to the fix\n- **Amendment 2** updated the requirement document itself"}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-110-40-amdt-2-flap-control-switch","history":"/api/acts/ad-emb-110-40-amdt-2-flap-control-switch/history","analysis":"/api/acts/ad-emb-110-40-amdt-2-flap-control-switch/analysis","conflicts":"/api/acts/ad-emb-110-40-amdt-2-flap-control-switch/conflicts","importantCases":"/api/acts/ad-emb-110-40-amdt-2-flap-control-switch/important-cases","documents":"/api/acts/ad-emb-110-40-amdt-2-flap-control-switch/documents"}}