GA 457-2004 居民身份证件层技术规范

上一篇: GA 451-2003 居民身份证卡体技术规范
下一篇: GA 434.4-2003 印刷业治安管理信息系统技术规范 第4部分:系统功能检测

标准名称：	易燃液体、气体或蒸汽的分类及电气设备安装危险区的划分
替代情况：	替代SY/T 6519-2001
发布部门：	国家能源局
发布日期：	2011-01-09
实施日期：	2011-05-01
首发日期：
作废日期：
出版社：	石油工业出版社
出版日期：	2011-05-01

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Product Code:SAE ARP5569
Title:Landing Gear Retraction / Extension Systems
Issuing Committee:A-5 Aerospace Landing Gear Systems Committee
Scope: This Aerospace Recommended Practice (ARP) will cover normal and emergency landing gear retraction/extension systems. This includes all equipment necessary for the control and sensing of the components used for raising and lowering the gear, up-locking and down-locking the gear, opening and closing the associated landing gear doors, and any latching of this equipment. The document will provide recommended practices for the use of conventional technologies and for those newer technologies now coming into use. It will include the regulatory and other safety requirements for these systems together with recommendations for; sequencing and timing, sensor selection, and failure monitoring of both normal and emergency operation and the support of maintenance and test needs.
Rationale: This Aerospace Recommended Practice (ARP) will cover normal and emergency landing gear retraction/extension systems. This includes all equipment necessary for the control and sensing of the components used for raising and lowering the gear, up-locking and down-locking the gear, opening and closing the associated landing gear doors, and any latching of this equipment. The document will provide recommended practices for the use of conventional technologies and for those newer technologies now coming into use. It will include the regulatory and other safety requirements for these systems together with recommendations for; sequencing and timing, sensor selection, and failure monitoring of both normal and emergency operation and the support of maintenance and test needs.