{"id":"F2008L02857","name":"AD/EMB-145/17 - Fuel System Reassessment","slug":"ad-emb-145-17-fuel-system-reassessment","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74736,"registerId":"commonwealth-F2008L02857-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-145/17 | Fuel System Reassessment | 9/2008 |\n| ------------- | ------------------------ | ------ |\n\n| Applicability: | Embraer EMB-145, EMB-145ER, EMB-145EU, EMB-145EP, EMB-145LR,EMB-145LU, EMB-145MR, EMB-145MP, EMB-145MK and EMB-145XR aircraft models in operation.This AD is not applicable to EMB-145LR aircraft modified according to Brazilian Supplemental Type Certificate (CHST) Nos. 2002S06-09, 2002S06-10 or2003S08-01.                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Alter the aircraft approved maintenance plan to include the tasks and their implementation plan presented in the Appendix 2, Section A2.5.2: Fuel System Limitation Items, as shown in the MRB-145/1150 Revision 10, dated4 August 2006, or further revisions approved by ANAC, with the intervals stated in that document.2. Alter the aircraft approved maintenance plan to include items 1, 2 and 3 of the Appendix 2, Section A2.4: Critical Design Configuration Control Limitations (CDCCL), as shown in the MRB-145/1150 Revision 10, dated 4 August 2006, or further revisions approved by ANAC, with the restrictions imposed by that document.Note: AGÊNCIA NACIONAL DE AVIAÇÃO CIVIL - BRAZIL AD 2007-08-02 refers. |\n| Compliance:    | For Requirement 1 - Before 31 December 2008, unless previously accomplished.For Requirement 2 - Within the next 90 days after the effective date of this AD, unless previously accomplished.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |\n|                | This Airworthiness Directive becomes effective on 28 August 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n\n| Background: | Fuel system reassessment, performed according to RBHA-E88/SFAR-88, requires the inclusion of new maintenance tasks in the Critical Design Configuration Control Limitations and in the Fuel System Limitations (FSL), necessary to preclude ignition sources in the fuel system. |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n16 July 2008","sortOrder":0},{"sectionNumber":"AD/EMB-145/17","sectionType":"part","heading":"AD/EMB-145/17","content":"## AD/EMB-145/17","sortOrder":1},{"sectionNumber":"Fuel System Reassessment","sectionType":"part","heading":"Fuel System Reassessment","content":"## Fuel System Reassessment","sortOrder":2},{"sectionNumber":"9/2008","sectionType":"part","heading":"9/2008","content":"## 9/2008","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":false,"description":"The document does not change the aircraft types covered; it prescribes additional maintenance tasks and limitations for the listed EMB‑145 variants (excluding specifically noted STC‑modified EMB‑145LRs). There is no text indicating an expansion or narrowing of applicability beyond the stated list and exclusions."},"complexity_factors":["Cross‑reference to external maintenance data (MRB‑145/1150 Revision 10, Appendix 2 Sections A2.5.2 and A2.4) and any further revisions only if approved by ANAC — operators must obtain, interpret and apply external documents.","Two separate requirements with different compliance windows: Requirement 1 must be done before 31 December 2008; Requirement 2 within 90 days of the AD effective date (AD effective 28 August 2008) — creates staggered scheduling pressure.","Applicability/exclusion requires verification of modification status for EMB‑145LR aircraft modified under Brazilian STCs 2002S06‑09, 2002S06‑10 or 2003S08‑01 — increases record checks.","Mandated amendment of the 'approved maintenance plan' entails administrative/regulatory steps and possible approvals to change operator manuals and maintenance routines.","'Restrictions imposed by that document' and reliance on ANAC approval introduce interpretive discretion and potential implementation variation between jurisdictions.","Reference to a Brazilian AD (AGÊNCIA NACIONAL DE AVIAÇÃO CIVIL - BRAZIL AD 2007‑08‑02) and RBHA‑E88/SFAR‑88 creates cross‑jurisdictional compliance context that may complicate conformity assessments.","Effective date shortly after issue (becomes effective 28 August 2008) reduces lead time for compliance planning."],"plain_english_summary":"**What it does:** Requires operators of Embraer EMB‑145 family aeroplanes (with specified exclusions for certain STC‑modified EMB‑145LRs) to amend their approved maintenance plans to add fuel‑system limitation tasks and Critical Design Configuration Control Limitations taken from MRB‑145/1150 Rev 10 (or later ANAC‑approved revisions). \n\n**Why it matters:** The change implements a fuel‑system reassessment under RBHA‑E88/SFAR‑88 intended to reduce ignition risk; operators bear the cost and scheduling changes, and the regulator enforces compliance by fixed deadlines."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — mandating specific fuel system maintenance updates for Embraer aircraft following international safety reassessment standards. It has not expanded beyond its initial purpose of implementing SFAR-88 fuel system safety requirements."},"complexity_factors":["Short, single-purpose directive with only 2 substantive requirements","Minimal defined terms (only standard aviation acronyms: AD, CDCCL, FSL, MRB, ANAC, CHST)","Clear applicability section with explicit model list and specific exemption","Simple conditional structure: two requirements with separate compliance dates","Heavy reliance on external documents (MRB-145/1150 Revision 10) for actual technical content — the directive itself is a pointer to maintenance manual changes rather than containing detailed technical specifications","Single cross-reference to Brazilian aviation authority (ANAC) and their AD 2007-08-02"],"plain_english_summary":"This CASA Airworthiness Directive requires operators of Embraer EMB-135/145 regional jets to amend maintenance programs to add fuel‑system inspection/maintenance tasks and impose design configuration controls to prevent ignition sources near fuel tanks. It implements Brazil’s SFAR‑88 protections to reduce risk of fuel‑tank explosions (e.g., TWA Flight 800).\n\nAffected are EMB‑145 variants and some EMB‑135s; certain EMB‑145LRs already modified under specified Brazilian approvals are exempt. It took effect 28 August 2008."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-145-17-fuel-system-reassessment","history":"/api/acts/ad-emb-145-17-fuel-system-reassessment/history","analysis":"/api/acts/ad-emb-145-17-fuel-system-reassessment/analysis","conflicts":"/api/acts/ad-emb-145-17-fuel-system-reassessment/conflicts","importantCases":"/api/acts/ad-emb-145-17-fuel-system-reassessment/important-cases","documents":"/api/acts/ad-emb-145-17-fuel-system-reassessment/documents"}}