{"id":"F2008L02129","name":"AD/EMB-145/2 - Vent and Pilot Valve Electrical Wiring Conduits","slug":"ad-emb-145-2-vent-and-pilot-valve-electrical-wiring-conduits","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74359,"registerId":"commonwealth-F2008L02129-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-145/2 | Vent and Pilot Valve Electrical Wiring Conduits | 8/2008 DM |\n| ------------ | ----------------------------------------------- | --------- |\n\n| Applicability: | EMB-145( ) model aircraft.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Unless already accomplished, replace the metallic tubes (conduits) enclosing the vent and pilot valve electrical wires in the right and left hand wing fuel tanks with non-conductive hoses (Teflon), with part numbers (P/N) AE717816-03, AE717816-04 or AE717816-05, as applicable, in accordance with the detailed instructions and procedures described in Embraer Service Bulletin (SB) 145-28-0023 Rev. 04 or SB145LEG-28-0018 Rev. 01, or further revisions approved by the Brazilian Agência Nacional de Aviação Civil (ANAC). |\n|                | Note 1: The “145LEG” series of Embraer Service Bulletins only applies to Legacy executive jets.                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n|                | Note 2: ANAC AD 2006-06-02 refers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |\n| Compliance:    | Within the next 5,000 hours time in service or 4 calendar years, whichever occurs first, after 28 June 2006 (the effective date of ANAC AD 2006-06-02).                                                                                                                                                                                                                                                                                                                                                                                |\n|                | This Airworthiness Directive becomes effective on 23 June 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n| Background:    | The ANAC has found that there is a possibility of sparks being generated due to internal contact between the wires of the vent and pilot valves of the pressure refuelling system inside the wing fuel tanks and the metallic tubes that enclose them, which may lead to a possible ignition source in the vicinity of the fuel tanks.                                                                                                                                                                                                 |\n|                | This Directive requires the replacement of the metallic tubes for vent and pilot valves wires in the wing fuel tanks.                                                                                                                                                                                                                                                                                                                                                                                                                  |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n16 June 2008","sortOrder":0},{"sectionNumber":"AD/EMB-145/2","sectionType":"part","heading":"AD/EMB-145/2","content":"## AD/EMB-145/2","sortOrder":1},{"sectionNumber":"Vent and Pilot Valve Electrical Wiring C","sectionType":"part","heading":"Vent and Pilot Valve Electrical Wiring Conduits","content":"## Vent and Pilot Valve Electrical Wiring Conduits","sortOrder":2},{"sectionNumber":"8/2008 DM","sectionType":"part","heading":"8/2008 DM","content":"## 8/2008 DM","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD stays within the original safety purpose described by ANAC: eliminate a potential ignition source inside wing fuel tanks by replacing conductive conduits with non‑conductive hoses. It does not broaden the remit beyond that technical, component‑level intervention (Requirement; Background)."},"complexity_factors":["Short, single‑issue AD focused on a single modification","Few defined terms; straightforward technical requirement","Cross‑references to two Embraer Service Bulletins and to ANAC AD 2006‑06‑02","Specification of three allowed part numbers (AE717816‑03, ‑04, ‑05) — limited variants","Single compliance window with a simple ‘whichever occurs first’ condition (5,000 hours or 4 years)","Two short notes (scope of 145LEG SBs; reference to ANAC AD)"],"plain_english_summary":"**What this instrument does (mechanical change)**\n\n- It requires replacing the metallic tubes (conduits) that carry the vent and pilot-valve electrical wires inside the left and right wing fuel tanks of Embraer EMB-135/EMB-145 series aeroplanes with non‑conductive Teflon hoses (parts AE717816-03, -04 or -05), using the procedures in Embraer Service Bulletin (SB) 145-28-0023 Rev.04 or SB145LEG-28-0018 Rev.01 (or later revisions approved by Brazil’s ANAC). (Requirement)\n\n**Who it affects**\n\n- Aircraft owners and operators of EMB-135 and EMB-145 series aircraft (Applicability).\n- Maintenance organisations and MROs authorised to perform Embraer SB work and supply the specified parts.\n- Parts suppliers that hold or can obtain the specified P/N Teflon hoses.\n\n**Why it matters (stated rationale and direct effect)**\n\n- The Brazilian regulator (ANAC) identified a risk that internal contact between the vent/pilot valve wires and the metallic conduits could generate sparks inside the wing fuel tanks, creating a possible ignition source near the fuel. The required replacement removes the conductive metallic conduit and so removes that particular spark path (Background).\n\n**Complying in practice**\n\n- Operators must do the replacement unless it has already been done, within 5,000 flight hours or 4 calendar years (whichever comes first) measured from 28 June 2006, and the AD became effective on 23 June 2008 (Compliance).\n- The SB titled with the suffix “145LEG” only applies to Legacy executive jets (Note 1). The AD cross‑references ANAC AD 2006‑06‑02 (Note 2).\n\n**Who pays, who decides, and what changes in behaviour**\n\n- The aircraft owner/operator bears the cost of parts, labour and aircraft downtime to perform the modification (Requirement; Compliance).\n- Maintenance providers perform the physical work according to Embraer SB procedures; ANAC (Brazil) must approve any later SB revisions that are used to comply; the Australian regulator issued the AD to require compliance domestically (Requirement).\n- Behaviour change: operators must schedule the modification into maintenance plans, procure specified P/N hoses, and keep records of compliance.\n\n**Practical trade‑offs, costs and risks**\n\n- Direct costs: purchase of specified Teflon hoses, labour and aircraft out-of-service time for each aircraft. Those costs are concentrated on affected operators; revenue for MROs and parts suppliers is correspondingly concentrated (Requirement).\n- Benefits: reduction of a specific ignition‑source risk inside wing tanks (Background). That benefit is concentrated (applies to aircraft at risk) and measurable only by reduced probability of the identified failure mode.\n- Implementation risk: incorrect installation or maintenance error could create other issues (e.g., routing, sealing, chafing) if the SB procedures are not followed strictly; compliance requires trained maintenance personnel and parts traceability (Requirement).\n- Bureaucratic discretion: the AD requires following Embraer SBs or later revisions approved by ANAC. That gives ANAC discretion to approve future SB changes; operators rely on regulator/MRO coordination to accept alternative methods of compliance (Requirement).\n- Substitution effects: operators may only comply using the specified P/N hoses or later ANAC‑approved revisions of the SB. That limits substitution to approved parts/procedures and concentrates demand on suppliers able to meet those approvals (Requirement).\n\n**Market and competition effects**\n\n- Small, focused market effect: MROs authorised for Embraer work and suppliers of the approved P/N hoses gain short‑term business; independent MROs without Embraer approvals may see less direct opportunity unless they obtain approval.\n- Little direct effect on ticket prices or wider competition in air transport; costs are incremental maintenance costs absorbed by operators and ultimately reflected in operator economics.\n\n**Enforcement and recordkeeping**\n\n- Compliance is mandatory within the stated timeframe; the AD is the legal instrument requiring operators to carry out the work and record compliance. Failure to comply can affect airworthiness certification and regulatory authorisations (Compliance).\n\n(References: Requirement; Compliance; Background; Note 1; Note 2.)"},"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, targeted Airworthiness Directive addressing a specific safety defect identified by the Brazilian aviation authority. The scope remains precisely limited to the wiring conduit replacement in wing fuel tanks for the EMB-145 family. There is no evidence of scope creep; the directive does exactly what its title and background describe."},"complexity_factors":["Single, specific technical requirement with clear part numbers and service bulletin references","Straightforward applicability (EMB-145 model aircraft only)","Simple compliance timeframe (5,000 hours OR 4 years, whichever first)","Minimal defined terms (only standard aviation abbreviations like P/N, SB, ANAC)","No nested exceptions or conditional logic — one requirement with one alternative service bulletin path for Legacy variants","Short document (approximately 300 words of substantive content)"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires owners/operators of Embraer EMB‑145 regional jets to replace metal wiring conduits inside wing fuel tanks with non‑conductive Teflon hoses to eliminate wire chafing that could spark and ignite fuel. Compliance (per Embraer service instructions) was required within 5,000 flight hours or 4 years after June 2006; the AD became mandatory on 23 June 2008."}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-145-2-vent-and-pilot-valve-electrical-wiring-conduits","history":"/api/acts/ad-emb-145-2-vent-and-pilot-valve-electrical-wiring-conduits/history","analysis":"/api/acts/ad-emb-145-2-vent-and-pilot-valve-electrical-wiring-conduits/analysis","conflicts":"/api/acts/ad-emb-145-2-vent-and-pilot-valve-electrical-wiring-conduits/conflicts","importantCases":"/api/acts/ad-emb-145-2-vent-and-pilot-valve-electrical-wiring-conduits/important-cases","documents":"/api/acts/ad-emb-145-2-vent-and-pilot-valve-electrical-wiring-conduits/documents"}}