{"id":"F2010L03144","name":"AD/EMB-145/24 - Fuel Conditioning Unit (FCU)","slug":"ad-emb-145-24-fuel-conditioning-unit-fcu","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":85309,"registerId":"commonwealth-F2010L03144-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Embraer EMB-135 and EMB-145 Series Aerop","sectionType":"division","heading":"Embraer EMB-135 and EMB-145 Series Aeroplanes","content":"### Embraer EMB-135 and EMB-145 Series Aeroplanes\n\n| AD/EMB-145/24 | Fuel Conditioning Unit (FCU) | 24/2010 |\n| ------------- | ---------------------------- | ------- |\n\n| Applicability: | EMB-135 and EMB-145 series aeroplanes as specified in ANAC AD 2009-08-03.                                                                                                                                                                                                                                                                                                                                                      |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Unless already accomplished, revise the Airworthiness Limitations Section (ALS) of the Instructions for Continued Airworthiness to incorporate limitations for fuel tank systems in accordance with the requirements of ANAC AD 2009-08-03.Do the Fuel System Limitation (FSL) tasks at the later of the applicable threshold and grace period times and repeat the inspections thereafter as specified in ANAC AD 2009-08-03. |\n| Compliance:    | As specified in ANAC AD 2009-08-03 with a revised effective date of20 December 2010.                                                                                                                                                                                                                                                                                                                                           |\n|                | This Airworthiness Directive becomes effective on 20 December 2010.                                                                                                                                                                                                                                                                                                                                                            |\n| Background:    | An aeroplane fuel tank systems review required by Special Federal Aviation Regulation Number 88 (SFAR 88) and Regulamento Brasileiro de Homologação Aeronáutica Especial no 88 (RBHA-E 88) has shown that additional maintenance and inspection instructions are necessary to maintain the design feature required to preclude the existence or development of an ignition source within the fuel tank of the aeroplane.       |\n\n![](image.001.png)\n\nMike Higgins  \nDelegate of the Civil Aviation Safety Authority\n\n29 November 2010","sortOrder":0},{"sectionNumber":"AD/EMB-145/24","sectionType":"part","heading":"AD/EMB-145/24","content":"## AD/EMB-145/24","sortOrder":1},{"sectionNumber":"Fuel Conditioning Unit (FCU)","sectionType":"part","heading":"Fuel Conditioning Unit (FCU)","content":"## Fuel Conditioning Unit (FCU)","sortOrder":2},{"sectionNumber":"24/2010","sectionType":"part","heading":"24/2010","content":"## 24/2010","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"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD adopts the fuel tank system limitations and inspection regime set out in ANAC AD 2009-08-03 for EMB-135/EMB-145 aeroplanes and does not expand applicability. The only noted modification is a revised effective/compliance date of 20 December 2010; scope remains focused on fuel tank system limitations and related FSL inspection tasks as specified in the referenced ANAC AD."},"complexity_factors":["Cross-reference to ANAC AD 2009-08-03 creates dependency on an external instrument for deadlines, thresholds and repeat intervals","Requires revision of the Airworthiness Limitations Section (ALS) of the Instructions for Continued Airworthiness","Mandated scheduled inspections (Fuel System Limitation tasks) with thresholds, grace periods and repeat intervals that affect maintenance planning","Limited applicability to EMB-135/EMB-145 series but requires fleet-level implementation where applicable","Effective date and revised compliance date (20 December 2010) require retroactive scheduling for some operators","Compliance actions imply ongoing record-keeping and coordination between operators and maintenance organisations"],"plain_english_summary":"This directive requires operators of Embraer EMB-135 and EMB-145 aeroplanes (as defined in ANAC AD 2009-08-03) to revise the Airworthiness Limitations Section of their Instructions for Continued Airworthiness to add fuel tank system limitations, and to perform the Fuel System Limitation (FSL) tasks at the thresholds, grace periods and repeat intervals specified in ANAC AD 2009-08-03. It follows a fuel‑tank safety review (SFAR 88 / RBHA‑E 88) that identified the need to reduce ignition‑source risk. Operators incur implementation costs and must schedule and coordinate inspections; compliance is effective 20 December 2010."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope. It addresses a specific safety finding regarding fuel tank systems in two Embraer aircraft series. There is no evidence of scope creep; it does not expand to cover other aircraft types, other systems, or broader operational requirements beyond the specific fuel system limitations mandated by the Brazilian authority."},"complexity_factors":["Short, single-purpose instrument (approximately 200 words of substantive content)","Only 1 defined reference (ANAC AD 2009-08-03 — the Brazilian aviation authority's directive)","Simple conditional structure: 'Unless already accomplished, do X'","No nested exceptions or complex logical operators","Heavy reliance on external document (ANAC AD 2009-08-03) for actual technical details — the AD essentially 'imports' Brazilian requirements rather than spelling them out","Minimal cross-referencing (only to SFAR 88 and RBHA-E 88 in background, which are explanatory rather than operative)"],"plain_english_summary":"CASA requires operators of Embraer EMB‑135 and EMB‑145 aircraft to update maintenance manuals and add recurring fuel system inspection (Fuel System Limitation) tasks, to begin by a specified deadline. \n\nThis mandatory AD responds to SFAR‑88/RBHA‑E88 findings about potential fuel‑tank ignition risks (related to the Fuel Conditioning Unit). It applies to airlines and maintenance organisations in Australia — non‑compliance legally grounds the aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-145-24-fuel-conditioning-unit-fcu","history":"/api/acts/ad-emb-145-24-fuel-conditioning-unit-fcu/history","analysis":"/api/acts/ad-emb-145-24-fuel-conditioning-unit-fcu/analysis","conflicts":"/api/acts/ad-emb-145-24-fuel-conditioning-unit-fcu/conflicts","importantCases":"/api/acts/ad-emb-145-24-fuel-conditioning-unit-fcu/important-cases","documents":"/api/acts/ad-emb-145-24-fuel-conditioning-unit-fcu/documents"}}