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AC 25.1309–1 is an FAA Advisory Circular (AC) (Subject: ''System Design and Analysis'') that describes acceptable means for showing compliance with the airworthiness requirements of § 25.1309 of the Federal Aviation Regulations. The present unreleased but working draft of AC 25.1309–1 is the Aviation Rulemaking Advisory Committee recommended revision ''B-Arsenal Draft'' (2002); the present ''released'' version is A (1988). The FAA and EASA have accepted proposals by type certificate applicants to use the Arsenal Draft on recent development programs.〔Spitzer, Cary R., ed, (''Digital Avionics Handbook'' ), 2nd ed., Avionics, Development and Implementation, CRC Press, Boca Raton, FL. 2007,p. 7-9.〕〔(AC 25-19A ), Certification Maintenance Requirements, 2011, p. 2〕 AC 25.1309–1 establishes the principle that the more severe the hazard resulting from a system or equipment failure, the less likely that failure must be. Failures that are catastrophic must be extremely improbable. == Airworthiness standards == The airworthiness requirements for transport category airplanes are contained in Title 14, Code of Federal Regulations (14 CFR) part 25 (commonly referred to as part 25 of the Federal Aviation Regulations (FAR)). Manufacturers of transport category airplanes must show that each airplane they produce of a given type design complies with the relevant standards of part 25. AC 25.1309–1 describes acceptable means for showing compliance with those airworthiness requirements. It recognizes Aerospace Recommended Practices ARP4754 and ARP4761 (or their successors) as such means:〔Spitzer, p. 7-9〕 *ARP4754A, ''Guidelines For Development Of Civil Aircraft and Systems'', is a guideline from SAE International, dealing with the development processes which support certification of Aircraft systems. This ARP further recognizes integration of DO-297, DO-178, and DO-254 into the guidelines for development and recognizes ARP5150/5151 as guidelines for in-service operation and maintenance. *ARP4761, ''Guidelines and Methods for Conducting the Safety Assessment Process On Civil Airborne Systems and Equipment'' 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「AC 25.1309-1」の詳細全文を読む スポンサード リンク
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