{"id":"F2006L00357","name":"AD/EMB-120/43 - Fuel Tank Ignition Sources","slug":"ad-emb-120-43-fuel-tank-ignition-sources","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116967,"registerId":"commonwealth-F2006L00357-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-120/43 | Fuel Tank Ignition Sources | 3/2006 |\n| ------------- | -------------------------- | ------ |\n\n| Applicability: | Embraer EMB-120 aircraft.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Replace the conduits of the fuel tanks ventilation and pilot valves harnesses with hoses.For aircraft serial numbers 120004 thru 120065 that had not incorporated Embraer Service Bulletins Nos. 120-28-0008, original issue, and 120-33-0024, original issue, or further revisions approved by the CTA, reroute the valves harnesses as specified by the Embraer Service Bulletin No. 120-28-0014, original issue, or further revisions approved by the CTA.The detailed instructions and procedures to accomplish this AD are described in the Embraer Service Bulletin No. 120-28-0014, original issue, or further revisions approved by the CTA.Note: CTA AD 2005-12-04 refers. |\n| Compliance:    | Within the next 5000 flight hours after the effective date of this AD.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |\n|                | This Airworthiness Directive becomes effective on 16 March 2006.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |\n| Background:    | This AD results from fuel system reviews conducted by the manufacturer.It has been verified that the conduits of the fuel tanks ventilation and pilot valves harnesses need to be replaced with hoses. In some aircraft the harnesses themselves need to be rerouted, in order 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-120/43","sectionType":"part","heading":"AD/EMB-120/43","content":"## AD/EMB-120/43","sortOrder":1},{"sectionNumber":"Fuel Tank Ignition Sources","sectionType":"part","heading":"Fuel Tank Ignition Sources","content":"## Fuel Tank Ignition Sources","sortOrder":2},{"sectionNumber":"3/2006","sectionType":"part","heading":"3/2006","content":"## 3/2006","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific fuel system safety issue identified by the manufacturer. The scope remains precisely limited to the identified ignition source risk in EMB-120 aircraft."},"complexity_factors":["Very short document (approximately 200 words of substantive content)","Only 2 main operative requirements (conduit replacement and conditional rerouting)","Single compliance deadline (5000 flight hours)","Limited applicability (one specific aircraft type with serial number range)","No nested definitions or interpretation sections","Cross-references only to external technical documents (Embraer Service Bulletins) rather than internal legislative provisions","No conditional logic beyond the serial number carve-out"],"plain_english_summary":"This AD requires Australian operators of Embraer EMB‑120 Brasilia aircraft (serials 120004–120065 lacking earlier mods) to replace fuel‑tank ventilation and valve wiring conduits with hoses, and on some older planes reroute wiring harnesses, to eliminate a spark ignition risk near fuel tanks. Compliance is mandatory within 5,000 flight hours from 16 March 2006, per Embraer Service Bulletin 120‑28‑0014 and Brazil’s CTA AD 2005‑12‑04."},"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's scope matches its stated objective: eliminate possible ignition sources near fuel tanks by replacing conduits and, for certain serial numbers, rerouting harnesses. It applies to Embraer EMB-120 aircraft and imposes work as described in the referenced service bulletin; it does not broaden obligations beyond that mitigation purpose."},"complexity_factors":["Technical hardware change: replacement of harness conduits with hoses plus possible rerouting (Requirement).","Applicability tied to specific serial-number range for rerouting (Applicability).","Dependence on external documents: Embraer Service Bulletins govern the detailed procedures (Requirement).","Regulatory approval/discretion: revisions require CTA approval and cross-reference to CTA AD 2005-12-04 (Requirement/Background).","Definite compliance window: 5,000 flight hours from the AD effective date (Compliance).","Operational impact: work must be performed by maintenance organisations with access to the specified service instructions (Background/Requirement)."],"plain_english_summary":"This Airworthiness Directive requires Embraer EMB-120 operators to replace the fuel-tank ventilation and pilot-valve harness conduits with hoses and, for specified serial numbers, to reroute valve harnesses as set out in Embraer Service Bulletin No. 120-28-0014 (or CTA‑approved revisions). Work must be done within 5,000 flight hours from the AD (effective 16 March 2006). Operators bear the compliance cost; the CTA must approve alternative bulletin revisions. The change mechanically removes potential ignition sources located near the fuel tanks."}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-120-43-fuel-tank-ignition-sources","history":"/api/acts/ad-emb-120-43-fuel-tank-ignition-sources/history","analysis":"/api/acts/ad-emb-120-43-fuel-tank-ignition-sources/analysis","conflicts":"/api/acts/ad-emb-120-43-fuel-tank-ignition-sources/conflicts","importantCases":"/api/acts/ad-emb-120-43-fuel-tank-ignition-sources/important-cases","documents":"/api/acts/ad-emb-120-43-fuel-tank-ignition-sources/documents"}}