{"id":"F2006B02338","name":"AD/AMD 10/23 - Fire Extinguishing System Non-Return Valves","slug":"ad-amd-10-23-fire-extinguishing-system-non-return-valves","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41568,"registerId":"commonwealth-F2006B02338-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AMD 10/23 - Fire Extinguishing System Non-Return Valves","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \n\nAIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.png)  \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 CAR 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\nAMD Falcon 10 Series Aeroplanes\n\nAD/AMD 10/23 Fire Extinguishing System Non-Return Valves\n\n  \n8/2001\n\nTX\n\nApplicability: Dassault Falcon 10 series aircraft.\n\nRequirement: Inspect the engine fire extinguishing system non-return valves in accordance with Dassault Aviation Service Bulletin F10-A291. Replace any non-return valves found to be defective.\n\nNote: DGAC Telex AD T2001-219-025(B) refers.\n\nCompliance: Before further flight after the effective date of this Airworthiness Directive.\n\nThis Airworthiness Directive becomes effective on 15 June 2001.\n\nBackground: This Airworthiness Directive is prompted by advice that, during engine fire bottle replacement, the fire extinguishing system non-return valves were found to be defective. In the event of an engine fire, the fire extinguishing agent would remain trapped in the system pipes and the fire would not be controlled.\n\n![](image.002.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 13 June 2001\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on .15 June 2001.\n\n  \nPage 1 of 1","sortOrder":0}],"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"},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD enforces inspection and replacement for non‑return valves on Dassault Falcon 10 series as described. It implements the stated safety fix without expanding or narrowing applicability beyond the aircraft series and actions specified in the instrument."},"complexity_factors":["Narrow applicability — applies only to Dassault Falcon 10 series (Applicability).","Single, discrete actions required — inspect and replace defective valves per Service Bulletin F10‑A291 (Requirement).","Immediate compliance deadline — must be done before further flight, increasing short‑term operational disruption (Compliance).","Dependence on manufacturer procedure — inspection/replacement must follow Dassault Service Bulletin F10‑A291, creating reliance on that document for technical steps (Requirement).","Reference to foreign authority document — DGAC Telex AD T2001‑219‑025(B) is noted, requiring cross‑reference for context (Note).","Regulatory source and discretion — issued by CASA delegate under subregulation 39.1(1) of CAR 1998, reflecting delegated administrative authority (preamble/signature).","Potential practical complications — parts availability or technical labour may delay compliance, but the AD does not set a graduated compliance scheme (Background/Compliance)."],"plain_english_summary":"This Airworthiness Directive orders operators of Dassault Falcon 10 aircraft to inspect engine fire‑extinguishing system non‑return valves following Dassault Service Bulletin F10‑A291 and to replace any defective valves. Compliance is mandatory before the next flight. CASA issued the AD to stop extinguishing agent becoming trapped in pipework during an engine fire. Operators bear inspection and replacement costs and may be grounded until defects are fixed; the AD references the manufacturer’s bulletin and a DGAC telex and is issued under CASA’s regulatory authority."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope: addressing a specific mechanical defect in a specific aircraft type's fire suppression system. No scope creep is evident."},"complexity_factors":["Single, specific aircraft type (Dassault Falcon 10 series)","One clear action required (inspect and replace if defective)","Single compliance deadline (before further flight)","No nested conditions, exceptions, or alternative compliance methods","References only one external document (Dassault Service Bulletin F10-A291)","Total length: approximately 250 words","No defined terms section — uses plain technical language"],"plain_english_summary":"This safety order requires operators of Dassault Falcon 10 series jets to inspect the engine fire-extinguishing system’s non-return valves and immediately replace any defective units, following Dassault Service Bulletin F10-A291. It’s mandatory before flight after 15 June 2001.  \n\nIt matters because defective valves can trap extinguishing agent in the lines so an engine fire may not be suppressed, creating a catastrophic risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-amd-10-23-fire-extinguishing-system-non-return-valves","history":"/api/acts/ad-amd-10-23-fire-extinguishing-system-non-return-valves/history","analysis":"/api/acts/ad-amd-10-23-fire-extinguishing-system-non-return-valves/analysis","conflicts":"/api/acts/ad-amd-10-23-fire-extinguishing-system-non-return-valves/conflicts","importantCases":"/api/acts/ad-amd-10-23-fire-extinguishing-system-non-return-valves/important-cases","documents":"/api/acts/ad-amd-10-23-fire-extinguishing-system-non-return-valves/documents"}}