{"id":"F2009L01576","name":"AD/A330/100 - Fire Extinguishing System - Replacement/Modification","slug":"ad-a330-100-fire-extinguishing-system-replacement-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":78323,"registerId":"commonwealth-F2009L01576-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Airbus Industrie A330 Series Aeroplanes","sectionType":"division","heading":"Airbus Industrie A330 Series Aeroplanes","content":"### Airbus Industrie A330 Series Aeroplanes\n\n| AD/A330/100 | Fire ExtinguishingSystem - Replacement/Modification | 5/2009 |\n| ----------- | --------------------------------------------------- | ------ |\n\n| Applicability: | AIRBUS (formerly AIRBUS INDUSTRIE) A330 models -201, -202, -203, -223,-243, -301, -302, -303, -321,-322, -323, -341, -342 and -343 aeroplanes, all serial numbers, except those on which AIRBUS modification 55590 has been embodied in production.                                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Replace or modify the Halon dual-filter assemblies of the flow metering fire extinguishing system in the forward and bulk cargo compartments, in accordance with instructions defined in AIRBUS Service Bulletin (SB) A330-26-3040 Revision 02.2. Report the accomplishment to AIRBUS.Modification of an aeroplane, prior to the effective date of this AD, in accordance with the instructions of SB A330-26-3040 at Original issue or Revision is acceptable to comply with requirement 1 of this AD.Note 1: EASA AD 2009-0064 dated 12 March 2009 refers.                                                                                                                                           |\n| Compliance:    | For Requirement 1:a. For aeroplanes fitted with Halon dual-filter assembly P/N QA06753 - Within 18 months from the effective date of this AD.b. For aeroplanes fitted with Halon dual-filter assembly P/N QA06753-01 or P/N QA06753-02 - Within 24 months from the effective date of this AD.Note 2: - The Halon Dual-Filter Assembly P/N QA06753 is embodied in production through modification 40041.- The Halon Dual-Filter Assembly P/N QA06753-01 is only embodied in service through SB A330-26-3030.- The Halon Dual-Filter Assembly P/N QA06753-02 is embodied in production through modification 47197 or 47883 or 50108 (BCRC) and 51065 or 51329 (LDCC) or in service through SB A330-26-3030. |\n\n|             | For Requirement 2 - Within 60 days after SB embodiment date, as defined in Requirement 1 of this AD.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |\n| ----------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|             | This Airworthiness Directive becomes effective on 7 May 2009.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |\n| Background: | During the qualification test campaign at the supplier site of the prototype Flow Metering Compact Unit (FMCU) Part Number (P/N) QA07907-03, partial blockage of the water absorbing filter element P/N QA06123 was observed several times. The blockage was created by carbon debris from the cartridge and from the burst disc of the Halon bottle.This water absorbing filter element is part of Halon Dual-Filter Assembly installed also in the Flow Metering System (FMS) of the cargo compartment Fire Extinguishing System used in the A330 and A340 aeroplanes.Blockage of the water absorbing filter element could lead to reduction of Halon outflow, leading to incapacity to maintain fire extinguishing agent concentration. Combined with fire, this could result in an uncontrolled fire in the affected compartment, which would constitute an unsafe condition.To avoid water absorbing filter element blockage, this AD requires replacement or modification of the Halon dual-filter assemblies of the lower deck cargo compartment fire extinguishing system:- in the forward cargo compartment for aeroplanes fitted with Lower Deck Cargo Compartment (LDCC) and- in the bulk cargo compartment for aeroplanes fitted with Bulk Cargo Rest Compartment (BCRC) fire extinguishing system. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n27 March 2009","sortOrder":0},{"sectionNumber":"AD/A330/100","sectionType":"part","heading":"AD/A330/100","content":"## AD/A330/100","sortOrder":1},{"sectionNumber":"Fire ExtinguishingSystem - Replacement/M","sectionType":"part","heading":"Fire ExtinguishingSystem - Replacement/Modification","content":"## Fire Extinguishing  \nSystem - Replacement/Modification","sortOrder":2},{"sectionNumber":"5/2009","sectionType":"part","heading":"5/2009","content":"## 5/2009","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":false,"description":"The AD's scope aligns with the document's stated safety concern: it targets specific Airbus A330 models except those with mod 55590 and mandates replacement/modification of Halon dual‑filter assemblies (Applicability; Requirement). It allows prior embodiment of the service bulletin to satisfy the requirement, but does not expand beyond the announced replacement/modification and associated reporting and compliance deadlines (Requirement; Compliance; Note 1)."},"complexity_factors":["Multiple specific part numbers for Halon dual‑filter assemblies (P/N QA06753, QA06753‑01, QA06753‑02) with different compliance windows (Compliance).","Applicability carve‑out for aeroplanes with production modification 55590 introduces exception handling (Applicability).","Dependence on external technical instructions: embodiment must follow AIRBUS SB A330‑26‑3040 Rev 02 and earlier acceptable SB issues (Requirement).","Reporting requirement to AIRBUS adds administrative burden and traceability obligations (Requirement).","Interplay of production and in‑service embodiment routes and multiple modification numbers listed (Compliance; Note 2) increases record‑checking complexity.","Cross‑reference to EASA AD and supplier qualification test findings links regulator and supplier inputs (Background; Note 1).","Safety‑critical nature (cargo fire suppression) raises operational disruption risk during maintenance windows."],"plain_english_summary":"_This Airworthiness Directive requires operators of specified Airbus A330 variants (all serial numbers except those with production modification 55590) to replace or modify the Halon dual‑filter assemblies in the forward and bulk lower‑deck cargo fire‑extinguishing systems, following AIRBUS Service Bulletin A330‑26‑3040 Rev 02._ (Requirement; Applicability)\n\nThe AD says the change is to prevent water‑absorbing filter blockage by carbon debris that can reduce Halon outflow and risk uncontrolled cargo fires (Background). It imposes staged compliance deadlines, a reporting obligation and accepts prior SB embodiment as compliance — creating direct maintenance, scheduling and reporting costs for affected operators (Requirement; Compliance)."},"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":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope: addressing a specific safety defect in fire extinguishing systems of A330 aircraft. The document shows no evidence of scope creep; it targets precisely the filter blockage issue identified in qualification testing, with applicability limited to specific part numbers and aircraft configurations."},"complexity_factors":["Single, specific technical requirement (filter replacement) with clear compliance pathways","Limited conditional logic: only two compliance timeframes based on specific part numbers (P/N QA06753 vs P/N QA06753-01/02)","Straightforward applicability test: specific aircraft models plus one production modification exemption","Cross-references only to one external document (Airbus Service Bulletin A330-26-3040) and one related European safety directive (EASA AD 2009-0064)","No nested definitions or interpretation sections — technical terms are industry-standard aviation abbreviations (P/N, SB, LDCC, BCRC)","Short document structure: Background, Applicability, Requirement, Compliance — standard AD format"],"plain_english_summary":"This AD requires operators of specified Airbus A330 variants to replace or modify Halon dual‑filter assemblies in forward and bulk cargo holds because carbon debris can clog water‑absorbing filters and impede Halon discharge in a cargo fire. Compliance must follow Airbus Service Bulletin procedures, include reporting to Airbus, and meet 18‑ or 24‑month compliance deadlines.\n\nThis is a mandatory, legally enforceable safety order; non‑compliance grounds the aircraft from legal flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a330-100-fire-extinguishing-system-replacement-modification","history":"/api/acts/ad-a330-100-fire-extinguishing-system-replacement-modification/history","analysis":"/api/acts/ad-a330-100-fire-extinguishing-system-replacement-modification/analysis","conflicts":"/api/acts/ad-a330-100-fire-extinguishing-system-replacement-modification/conflicts","importantCases":"/api/acts/ad-a330-100-fire-extinguishing-system-replacement-modification/important-cases","documents":"/api/acts/ad-a330-100-fire-extinguishing-system-replacement-modification/documents"}}