{"id":"F2006L00358","name":"AD/EMB-120/42 - De-Ice System","slug":"ad-emb-120-42-de-ice-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116969,"registerId":"commonwealth-F2006L00358-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Embraer EMB-120 (Brasilia) Series Aeropl","sectionType":"division","heading":"Embraer EMB-120 (Brasilia) Series Aeroplanes","content":"### Embraer EMB-120 (Brasilia) Series Aeroplanes\n\n| AD/EMB-120/42 | De-Ice System | 3/2006 |\n| ------------- | ------------- | ------ |\n\n| Applicability: | All model EMB-120( ) aeroplanes.                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | If not previously accomplished, replace the de-ice system ejector flow control valves part number (P/N) 3D2376-06 with valves P/N 3D2376-07 in accordance with Embraer Service Bulletin 120-30-0034 dated 30 October 2003 or later revision approved by the Centro Técnico Aeroespacial.                                                                                                                                                                                 |\n|                | Note: DAC (Brazil) AD 2005-12-02 refers.                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n| Compliance:    | Within 5000 hours time in services after the effective date of this Directive.                                                                                                                                                                                                                                                                                                                                                                                           |\n|                | This Airworthiness Directive becomes effective on 16 March 2006.                                                                                                                                                                                                                                                                                                                                                                                                         |\n| Background:    | The Brazilian Departamento de Aviação Civil (DAC) has advised that the aircraft manufacturer has conducted a review of the fuel system to ensure compliance with United States Special Federal Aviation Regulation (SFAR) 88.The review verified that the replacement of the current de-ice system ejector flow control valves with others featuring hermetically sealed switches was required to preclude a possible ignition source in the vicinity of the fuel tanks. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n1 February 2006","sortOrder":0},{"sectionNumber":"AD/EMB-120/42","sectionType":"part","heading":"AD/EMB-120/42","content":"## AD/EMB-120/42","sortOrder":1},{"sectionNumber":"De-Ice System","sectionType":"part","heading":"De-Ice System","content":"## De-Ice System","sortOrder":2},{"sectionNumber":"3/2006","sectionType":"part","heading":"3/2006","content":"## 3/2006","sortOrder":3}],"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 standard, narrow Airworthiness Directive focused on a specific safety-critical component replacement. It has not expanded beyond its original purpose of addressing an identified ignition source risk."},"complexity_factors":["Single, specific mechanical part replacement with clear part numbers","Only one substantive requirement with straightforward compliance deadline","Minimal cross-referencing (one service bulletin and one Brazilian AD reference)","No conditional exceptions or nested logic","Short document (approximately 200 words of substantive content)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to all **Embraer EMB-120 'Brasilia' aircraft** operating in Australia.\n\n**What it requires:**\n- Aircraft operators must **replace specific de-icing system valves** (part number 3D2376-06) with an improved version (part number 3D2376-07)\n- The replacement must follow the manufacturer's official instructions (Embraer Service Bulletin 120-30-0034)\n\n**Why this matters:**\n- The old valves could potentially create **sparks near fuel tanks** — a serious fire and explosion risk\n- The new valves have **hermetically sealed switches** (completely enclosed to prevent any spark escaping)\n- This change was triggered by a US safety regulation (SFAR 88) requiring manufacturers to review fuel system ignition risks\n\n**When it must be done:**\n- Within **5,000 flight hours** after 16 March 2006\n\n**Who needs to comply:**\n- Any Australian operator flying these Brazilian-made regional aircraft"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope remains focused on replacing the specified de-ice ejector valves on all EMB-120 aeroplanes within 5,000 flight hours to address a potential ignition source identified in the SFAR 88 review. The AD follows the manufacturer’s service bulletin and references the DAC AD; it does not expand or narrow obligations beyond that replacement."},"complexity_factors":["Single, discrete technical action: mandated replacement of a specific part number (Requirement).","Fleet-wide applicability: applies to all EMB-120 aeroplanes (Applicability) increasing aggregate maintenance demand.","Fixed compliance window: 5,000 flight hours creates a measurable scheduling and operational cost (Compliance).","Reliance on an external service bulletin and foreign authority: mandates compliance with Embraer Service Bulletin 120-30-0034 and notes DAC AD 2005-12-02 (Requirement/Background).","Regulatory approval path for later revisions: allows later service bulletin revisions only if approved by Centro Técnico Aeroespacial, adding administrative discretion (Requirement).","Safety-critical context: action ties to fuel-tank ignition risk identified in the SFAR 88 review (Background), so non-compliance has clear safety consequences."],"plain_english_summary":"This Directive requires replacing the de-ice system ejector flow-control valves P/N 3D2376-06 with P/N 3D2376-07 on all Embraer EMB-120 aeroplanes, to be completed within 5,000 flight hours and effective 16 March 2006. The manufacturer’s SFAR 88 review found the new valves have hermetically sealed switches intended to remove a possible ignition source near the fuel tanks."}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-120-42-de-ice-system","history":"/api/acts/ad-emb-120-42-de-ice-system/history","analysis":"/api/acts/ad-emb-120-42-de-ice-system/analysis","conflicts":"/api/acts/ad-emb-120-42-de-ice-system/conflicts","importantCases":"/api/acts/ad-emb-120-42-de-ice-system/important-cases","documents":"/api/acts/ad-emb-120-42-de-ice-system/documents"}}