{"id":"F2005L00574","name":"AD/A330/48 - Fire Extinguishing System","slug":"ad-a330-48-fire-extinguishing-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":112801,"registerId":"commonwealth-F2005L00574-current","compilationNumber":null,"startDate":"2026-04-03","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/A330/48 | Fire Extinguishing System | 4/2005 |\n| ---------- | ------------------------- | ------ |\n\n| Applicability: | AIRBUS aircraft A330 aeroplanes. |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. Carry out restoration of the fire extinguishing system after activation in accordance with the following procedure included in the 1 October 2004 revision of the Aircraft Maintenance Manual (AMM):A330 AMM 26-23-00 Page Block 201 (LDCC-FMS).2. The following measures are rendered mandatory except for aircraft delivered from the production line after 1 October 2004 (date of revision that includes both the restoration/cleaning task in the AMM and the grease application caution note in the work instructions for Airbus Manufacturing) and on which the fire extinguishing system is confirmed to have never been activated before the effective date of this Directive:(a) For aircraft on which the fire extinguishing system has been activated at least once before the effective date of this Directive or it is uncertain whether the fire extinguishing system has ever been activated or not:, perform a one time inspection to clean and restore FMS in the LDCC with pressure reducers replacement in accordance with instructions given in AIRBUS Service Bulletin (SB) A330-26-3031 Revision 02 or later DGAC approved revisions.(b) For aircraft on which the fire extinguishing system is confirmed to have never been activated before 1 October 2004:, perform a one time inspection to clean and restore FMS in the LDCC in accordance with instructions given in AIRBUS SB A330-26-3031 Revision 02 or later DGAC approved revisions.Note: DGAC AD F-2005-019 EASA approval No. 2005-877 dated 25 January 2005 refers. |\n| Compliance: | 1. From the effective date of this Directive, after any activation of the fire extinguishing system in the LDCC.2. (a) Within 2,400 Flight Hours (FH) following the effective date of this Directive.2. (b) Within 6,600 FH following the effective date of this Directive. |\n\n| | This Airworthiness Directive becomes effective on 14 April 2005. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Background: | Flight tests have shown that the Flow Metering System (FMS) of the fire extinguishing system may be blocked by anti-fretting material contamination. The origin of this anti-fretting material inside the piping, filters and pressure reducers may come from manufacturing of the parts as well as installation on aircraft during production or maintenance. After the first activation of the fire extinguishing system, it has been assumed that the FMS is contaminated and it cannot be guaranteed that the system is fully operable for the next fire extinguishing process if requested. An uncontrollable fire in the affected compartment may lead to a catastrophic event. To avoid this hidden failure of the Lower Deck Cargo Compartment (LDCC) fire extinguishing system due to contamination, this Airworthiness Directive requires a one time inspection to clean the FMS and mandates new procedures for the restoration of the fire extinguishing system after any activation. |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n2 March 2005","sortOrder":0},{"sectionNumber":"AD/A330/48","sectionType":"part","heading":"AD/A330/48","content":"## AD/A330/48","sortOrder":1},{"sectionNumber":"Fire Extinguishing System","sectionType":"part","heading":"Fire Extinguishing System","content":"## Fire Extinguishing System","sortOrder":2},{"sectionNumber":"4/2005","sectionType":"part","heading":"4/2005","content":"## 4/2005","sortOrder":3}],"analysis":{"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":4,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive with a focused, single-purpose scope: addressing contamination in the A330 cargo fire extinguishing system. The document does not show scope creep; it maintains its original safety intent throughout."},"complexity_factors":["Multiple conditional compliance pathways based on aircraft manufacturing date and fire system activation history","Cross-references to external documents: Airbus Service Bulletin A330-26-3031 Revision 02, DGAC AD F-2005-019, EASA approval No. 2005-877, and AMM 26-23-00 Page Block 201","Nested exceptions: exemption for post-October 2004 aircraft with confirmed clean systems, with sub-conditions for activation status","Technical aviation terminology requiring domain knowledge (FMS, LDCC, FH, DGAC, SB, AMM)","Dual compliance timelines (2,400 FH vs 6,600 FH) triggered by different historical conditions"],"plain_english_summary":"This AD for Airbus A330s addresses contamination of the lower-deck cargo fire extinguishing Flow Metering System by anti‑fretting material, which can occur during production or maintenance and render the system ineffective after activation. It mandates a one‑time inspection/cleaning for in‑service aircraft and adoption of updated cleaning/restoration procedures after any future activation; aircraft built and confirmed clean after Oct 2004 are exempt. The measure restores reliable cargo fire protection."},"flash_summary":{"complexity_score":7,"scope_assessment":{"changed":false,"description":"Scope matches the stated intent to mitigate contamination risk in the LDCC Flow Metering System by mandating restoration after activation and a one‑time cleaning/pressure‑reducer replacement for affected aircraft, with an exception for production‑delivered aircraft confirmed never activated before 1 Oct 2004. Practically, operators and maintenance organisations pay for inspections, cleaning, parts and labour and must confirm activation history and meet flight‑hour deadlines; regulatory execution references AMM/SB procedures and DGAC/EASA approvals (Requirement 1–2; Compliance 1–2; Note)."},"complexity_factors":["Technical procedures mandated: restoration per A330 AMM 26-23-00 Page Block 201 (LDCC‑FMS) and cleaning/repair per AIRBUS SB A330-26-3031 Rev 02 (Requirement 1–2).","Conditional scope based on aircraft history: different obligations if the FMS has been activated, is uncertain, or never activated before 1 Oct 2004 (Requirement 2).","Multiple compliance timetables tied to flight hours: immediate restoration after any activation; one‑time inspections within 2,400 FH or 6,600 FH depending on cohort (Compliance 1–2).","Mandatory parts replacement: pressure reducers must be replaced as part of the restoration/inspection (Requirement 2(a)).","Interdependency with manufacturer documents and foreign approvals: relies on AMM, Airbus SB revisions and DGAC/EASA approvals (Requirement, Note).","Safety‑critical context increases procedural and evidentiary burden: hidden failure risk in LDCC FMS requires strict adherence (Background).","Mixed one‑off and event‑triggered actions: combines a one‑time cleaning programme with ongoing mandatory restoration after any activation.","Operational burden on operators/maintainers to confirm activation history and schedule inspections within FH windows (Requirement 2; Compliance 2).","Logistics and supply demands for replacement parts and suitably qualified maintenance resources within regulatory timeframes."],"plain_english_summary":"Requires operators of Airbus A330 aeroplanes to restore the Lower Deck Cargo Compartment (LDCC) fire‑extinguishing Flow Metering System (FMS) after any activation and, for most aircraft, to perform a one‑time inspection, cleaning and pressure‑reducer replacement per Airbus AMM and Service Bulletin instructions. The directive says contamination by anti‑fretting material can block the FMS and impair LDCC fire suppression; it therefore imposes mandatory restoration and cleaning deadlines affecting airlines and maintenance organisations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a330-48-fire-extinguishing-system","history":"/api/acts/ad-a330-48-fire-extinguishing-system/history","analysis":"/api/acts/ad-a330-48-fire-extinguishing-system/analysis","conflicts":"/api/acts/ad-a330-48-fire-extinguishing-system/conflicts","importantCases":"/api/acts/ad-a330-48-fire-extinguishing-system/important-cases","documents":"/api/acts/ad-a330-48-fire-extinguishing-system/documents"}}