{"id":"F2008L02116","name":"AD/EMB-120/47 - Fuel Booster Pump Electrical Wiring","slug":"ad-emb-120-47-fuel-booster-pump-electrical-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74349,"registerId":"commonwealth-F2008L02116-current","compilationNumber":null,"startDate":"2026-04-02","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-120/47 | Fuel Booster Pump Electrical Wiring | 8/2008 DM |\n| ------------- | ----------------------------------- | --------- |\n\n| Applicability: | EMB-120 aircraft models, serial numbers 120001 to 120359 inclusive.                                                                                                                                                                                                                                |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Insert the following statement in Limitations Section of the Aircraft Flight Manual (AFM), this may be accomplished by inserting a copy of this Directive in the AFM.                                                                                                                           |\n|                | “The minimum fuel quantity inside each tank must be 300kg or 370 litres”                                                                                                                                                                                                                           |\n|                | Note 1: After the effective date of this Directive, any fuel tank defueling or other maintenance action which requires use of the fuel booster pumps is limited to a minimum fuel quantity not to be less than 300kg or 370 litres inside the respective tank.                                     |\n|                | 2. Inspect the fuel booster pump electrical harness of the left hand and right hand (LH/RH) tanks in accordance with Embraer Service Bulletin 120-28-0016 dated 9 January 2008 or later revisions approved by the Brazilian Agência Nacional de Aviação Civil (ANAC).                              |\n|                | 3. If, during the Requirement 2 inspection any damage is found, replace the affected fuel booster pump by another one with the same part number.                                                                                                                                                   |\n|                | 4. Install clamps on the tank structure and attach each fuel booster pump electrical harness at the LH/RH fuel tanks to avoid eventual chafing against the pump body, adjacent fuel lines, structure or any other part, in accordance withSB120-28-0016 or further revisions approved by the ANAC. |\n|                | Note 2: Following compliance with Requirements 2 and 4, the AFM limitations imposed by Requirement 1 may be removed from the AFM and the Note 1 maintenance restriction is no longer applicable.                                                                                                   |\n|                | Note 3: ANAC AD 2008-05-01 refers.                                                                                                                                                                                                                                                                 |\n| Compliance:    | For Requirement 1 - Within the next 30 days after the effective date of this Directive.                                                                                                                                                                                                            |\n|                | For Requirement 2 and 4 - Within the next 4000 flight hours or 24 calendar months or at next time the fuel tank is opened (scheduled or unscheduled), after the effective date of this Directive, whichever occurs first.                                                                          |\n\n|             | For Requirement 3 - Before further flight after the Requirement 2 inspection.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|             | This Airworthiness Directive becomes effective on 18 June 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| Background: | The ANAC has advised that one occurrence of a fuel booster pump circuit breaker opening during an engine maintenance servicing has been reported. An inspection inside the fuel tank revealed the fuel booster pumps electrical harness chafing against its body, causing the loss of the electrical wiring protection and resulting in a short circuit. Further in-tank inspections have showed other fuel booster pump electrical harnesses chafing either with the pump body and/or with adjacent fuel lines, causing damage to the harness protective layers and resulting on possible ignition source inside the fuel tank. |\n|             | This Directive requires temporary revision of the AFM, inspection of fuel booster pumps electrical harness installed on LH/RH tanks together with installation of clamps on tank structure and tie-raps to attach these electrical harnesses is.                                                                                                                                                                                                                                                                                                                                                                                 |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n12 June 2008","sortOrder":0},{"sectionNumber":"AD/EMB-120/47","sectionType":"part","heading":"AD/EMB-120/47","content":"## AD/EMB-120/47","sortOrder":1},{"sectionNumber":"Fuel Booster Pump Electrical Wiring","sectionType":"part","heading":"Fuel Booster Pump Electrical Wiring","content":"## Fuel Booster Pump Electrical Wiring","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":"Scope aligns with the stated safety issue in the Background: it targets EMB‑120 serials 120001–120359 and imposes a temporary AFM fuel‑quantity restriction plus in‑tank inspection and corrective work per SB 120‑28‑0016. Measures are limited to preventing harness chafing and addressing detected damage, with AFM limits removed after compliance."},"complexity_factors":["Narrow applicability: specific serial numbers only (Applicability: EMB-120 serials 120001–120359).","Multiple, distinct actions required: AFM amendment, inspections, clamp/tie‑rap installation, and possible part replacement (Requirement 1–4).","Dependence on external service material and regulator approvals: inspections/installations must follow Embraer SB 120‑28‑0016 or later ANAC‑approved revisions (Requirement 2, 4).","Staged compliance windows and triggers: AFM change within 30 days; inspections/installation within 4,000 flight hours or 24 months or when tank opened, whichever first (Compliance).","Operational constraint and risk of flight disruption: replacement of any damaged pump is mandatory before further flight (Requirement 3).","Conditional removal of the AFM limitation only after completion of inspection and corrective work (Note 2).","Recordkeeping and maintenance coordination burden on operators during tank access events (Note 1, Compliance)."],"plain_english_summary":"This directive requires operators of Embraer EMB‑120 aeroplanes (serials 120001–120359) to add a temporary AFM limit (minimum 300 kg / 370 L per tank), inspect the LH/RH fuel booster pump electrical harnesses per Embraer Service Bulletin 120‑28‑0016 (ANAC‑approved), replace any damaged pump before further flight, and install clamps/tie‑raps to prevent chafing. It responds to reported harness chafing that caused short circuits and a potential ignition source inside fuel tanks. Operators pay for inspections, repairs and AFM paperwork; the AFM restriction is removable after the work is done."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive maintaining its original narrow scope: addressing a specific wiring chafing defect in specific Embraer aircraft models. The scope has not expanded beyond the original safety issue identified by the Brazilian aviation authority."},"complexity_factors":["Short, single-purpose safety directive with only 4 sequential requirements","Minimal defined terms (only standard aviation abbreviations: AFM, LH/RH, ANAC)","Simple conditional logic: 'If damage found during Requirement 2, then do Requirement 3'","Clear cross-references to single external document (Embraer Service Bulletin 120-28-0016)","Straightforward compliance timeline with 'whichever occurs first' alternative triggers","No nested exceptions or complex definitional sections"],"plain_english_summary":"This AD requires operators of Embraer EMB-120 (S/N 120001–120359) to address chafing fuel‑pump wiring inside the wing tanks that can cause shorts and sparks in fuel vapour. It mandates a temporary AFM fuel‑minimum, followed by inspection, repair or pump replacement if damage is found, and installation of clamps to secure wiring; the fuel restriction is lifted once the permanent fix is done. It targets Australian operators to prevent fuel‑tank fire/explosion risk."},"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-120-47-fuel-booster-pump-electrical-wiring","history":"/api/acts/ad-emb-120-47-fuel-booster-pump-electrical-wiring/history","analysis":"/api/acts/ad-emb-120-47-fuel-booster-pump-electrical-wiring/analysis","conflicts":"/api/acts/ad-emb-120-47-fuel-booster-pump-electrical-wiring/conflicts","importantCases":"/api/acts/ad-emb-120-47-fuel-booster-pump-electrical-wiring/important-cases","documents":"/api/acts/ad-emb-120-47-fuel-booster-pump-electrical-wiring/documents"}}