{"id":"F2006B03207","name":"AD/B747/313 - Fire Extinguisher Bottles","slug":"ad-b747-313-fire-extinguisher-bottles","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42579,"registerId":"commonwealth-F2006B03207-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# ![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n![](image.001.png)\n\nBoeing 747 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/B747/313 Fire Extinguisher Bottles 10","sectionType":"part","heading":"AD/B747/313 Fire Extinguisher Bottles 10/2004","content":"# AD/B747/313 Fire Extinguisher Bottles 10/2004\n\nApplicability: Boeing Model 747-100, 747-200B, 747-200C, 747-200F, 747- 300, 747-400, 747-\n\n400D, 747-400F, and 747 SR series aeroplanes, as listed in Boeing Alert Service Bulletin 747-26A2272, dated 16 January 2003.\n\nRequirement: 1. Perform an inspection to determine the part number (P/N) of the fire extinguisher bottles in the engine and the APU per the Accomplishment Instructions of Boeing Alert Service Bulletin 747- 26A2272.\n\nNote 1: Boeing Alert Service Bulletin 747-26A2272 refers to Kidde Aerospace Service Bulletin A820400-26-432, dated 19 October 2002; and Kidde Aerospace Service Bulletin A830800-26-433, dated 19 October 2002; as additional sources of service information for accomplishment of the inspection and replacement, if necessary, for Model 747-100, 747-200B, 747-200C, 747-200F, 747-300, 747-400,\n\n747- 400D, 747-400F, and 747SR series aeroplanes; as applicable.\n\n    (a) If no \"Pre SB A820400-26-432\" P/N listed in Table 2 of Kidde Aerospace Service Bulletin A820400-26-432 is found installed; and if no \"Pre SB A830800-26-433\" P/N listed in Table 2 of Kidde Aerospace Service Bulletin A830800-26- 433 is found installed; no further action is required.\n\n    (b) If any \"Pre SB A820400-26-432\" P/N listed in Table 2 of Kidde Aerospace Service Bulletin A820400-26-432 is found installed; or if any \"Pre SB A830800-26-433\" P/N listed in Table 2 of Kidde Aerospace Service Bulletin A830800-26- 433, is found installed; replace the fire extinguisher bottle with a new fire extinguisher bottle having the \"Post SB\" P/N listed in Table 2 of the applicable Kidde Aerospace service bulletin in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 747-26A2272.\n\n2. Do not install on any aeroplane a Kidde Aerospace fire extinguisher bottle with any \"Pre SB A820400-26-432\" P/N listed in Table 2 of Kidde Aerospace Service Bulletin A820400-26-432; or any \"Pre SB A830800-26-433\" P/N listed in Table 2 of Kidde Aerospace Service Bulletin A830800-26-433.\n\nNote 2: FAA AD 2004-14-13 Amdt 39-13722 refers.","sortOrder":1}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard single-issue Airworthiness Directive focused specifically on fire extinguisher bottle safety. It has not expanded beyond its original technical safety purpose."},"complexity_factors":["Multiple cross-references to external Boeing and Kidde Aerospace service bulletins (4 separate documents referenced)","Conditional logic requiring operators to check against Table 2 in two different service bulletins to determine if action is required","Specific part number (P/N) matching required to determine compliance path","Nested applicability covering 9 different Boeing 747 model variants","Dual compliance paths (inspection/replacement vs. no action required) depending on findings"],"plain_english_summary":"This CASA Airworthiness Directive orders operators of specified Boeing 747s to inspect engine and APU fire extinguisher bottles for certain older Kidde Aerospace part numbers and replace any unsafe bottles with approved replacements. It affects owners/operators who may have those legacy bottles and matters because defective bottles could fail during an engine/APU fire, risking catastrophic consequences."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD remains tightly focused on replacing specific Kidde fire extinguisher bottle part numbers on a defined set of Boeing 747 models. It does not broaden the regulated items (still only certain Kidde bottles), nor extend to other aircraft types or unrelated systems, nor create new regulatory powers. The directive follows the typical corrective pattern: identify affected parts by P/N, require replacement where older P/Ns are found, and prohibit reinstalling the older P/Ns. There is no indication in the text provided that the AD expanded beyond that original, narrowly technical safety objective."},"complexity_factors":["Short instrument with two primary operative requirements (inspect-and-replace; prohibition on reinstalling Pre SB parts).","Limited applicability list (specific Boeing 747 variants) rather than open-ended scope.","Cross-references to three external service bulletins (Boeing Alert SB 747-26A2272; Kidde A820400-26-432; Kidde A830800-26-433) and to FAA AD 2004-14-13, requiring users to consult multiple external documents for full technical detail.","Conditional logic based on P/N lookup against Table 2 in the Kidde service bulletins (branching: no action vs replace).","Dependence on an external \"compliance section\" for timing (not reproduced), creating a small additional lookup requirement.","No nested exceptions or multiple layers of carve-outs — single layer of conditions only."],"plain_english_summary":"**What this directive does (mechanically)**\n\n- Applies to specified Boeing 747 models (747-100/200/300/400 series, 747F, 747SR) listed in Boeing Alert Service Bulletin 747-26A2272 (see \"Applicability\").\n- Requires operators to inspect the part number (P/N) of Kidde-series fire extinguisher bottles installed on the engines and the APU (auxiliary power unit) following the instructions in Boeing Alert Service Bulletin 747-26A2272 (Requirement 1).\n- If the inspection shows an older (\"Pre SB\") Kidde P/N listed in Table 2 of the relevant Kidde service bulletin, the operator must replace that bottle with the corresponding new (\"Post SB\") Kidde P/N, again following Boeing's accomplishment instructions (Requirement 1(b)).\n- If no listed \"Pre SB\" P/Ns are found, no further action is required (Requirement 1(a)).\n- It is explicitly forbidden to install any Kidde bottle that has a listed \"Pre SB\" P/N on any affected aeroplane from now on (Requirement 2).\n\n**Who this affects**\n\n- Airline and freight operators that own, lease or maintain the listed Boeing 747 variants.\n- Maintenance organisations that inspect, service or replace engine and APU fire extinguisher bottles on those aircraft.\n- Suppliers/manufacturers of the replacement (Post SB) Kidde bottles, and of course Kidde as the original parts supplier.\n\n**Why it matters (source claim and practical effect)**\n\n- The AD is issued because the CASA delegate considers the existing (pre‑service‑bulletin) Kidde extinguisher bottles an \"unsafe condition\" for the listed aeroplanes; the directive therefore compels inspection and, where necessary, replacement to correct that condition (preamble and Requirement). That is the official rationale the AD records.\n\n**Costs, incentives and trade-offs**\n\n- Who pays: aircraft operators bear the direct costs — labour for inspections, replacement parts (Post SB bottles), and downtime while work is done. Maintenance organisations incur workload and record‑keeping costs. The suppliers of Post SB bottles gain the benefit of sales to replace older units.\n- Behaviour change required: operators must add a P/N check of engine and APU extinguishers to their maintenance tasks and must not reinstall any prohibited Pre SB P/N bottles. They must follow Boeing's and Kidde's service instructions when performing work.\n- Compliance burden & implementation risk: tracking P/Ns across a fleet (physical inspections, maintenance records) is required. Supply constraints for replacement bottles could cause scheduling/downtime risk. Incorrect identification of P/Ns or incomplete adherence to the Boeing/Kidde instructions could leave the unsafe condition uncorrected.\n- Administrative mechanism and discretion: the AD is issued under CASR subregulation 39.1(1) by the CASA delegate and mandates compliance as to timing in the AD's compliance section (not reproduced here). Boeing and Kidde service bulletins are incorporated by reference for the technical steps; this places practical reliance on manufacturer instructions for how the work is done.\n\n**Concrete implementation steps for an operator (summary)**\n\n1. Consult Boeing Alert Service Bulletin 747-26A2272 and the referenced Kidde Service Bulletins (A820400-26-432 and A830800-26-433) for the correct inspection method and the Table 2 lists of Pre SB vs Post SB P/Ns (Note 1).\n2. Inspect each engine and APU extinguisher bottle to read the P/N.\n3. If the P/N matches a Pre SB P/N in the applicable Kidde Table 2, replace it with the Post SB P/N specified and record the work; if not, document that no action was required.\n4. Do not install any bottle with a Pre SB P/N on affected aircraft going forward (Requirement 2).\n\n**Other references**\n\n- The AD cross‑references FAA AD 2004-14-13 (Note 2), indicating alignment with the FAA action on the same issue.\n\n(Sections relied on: \"Applicability\"; \"Requirement\" paragraphs 1 and 2; Notes 1 and 2; preamble referencing CASR subregulation 39.1(1).)\n"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-313-fire-extinguisher-bottles","history":"/api/acts/ad-b747-313-fire-extinguisher-bottles/history","analysis":"/api/acts/ad-b747-313-fire-extinguisher-bottles/analysis","conflicts":"/api/acts/ad-b747-313-fire-extinguisher-bottles/conflicts","importantCases":"/api/acts/ad-b747-313-fire-extinguisher-bottles/important-cases","documents":"/api/acts/ad-b747-313-fire-extinguisher-bottles/documents"}}