本文件规定了设计标准和试验方法，足以保证航空业使用的具有典型22 250 N（5 000 lbf）额定极限拉伸载荷能力的货物约束带组件的极限载荷和运行可靠性。这些约束带用于民用运输飞机在飞行过程中: a） 装载并系在适航批准的空运货盘上的货物，其本身被限制在飞机下层甲板、主甲板或上层甲板货物系统中，并符合ISO 8097（NAS 3610）或ISO 21100的要求，或 b） 非单元化单件货物，或放置在不受限制的（“浮动”）托盘上的货物，放入飞机的下层甲板、主甲板或上层甲板集装箱货舱， c） 同样的约束带总成也可用于其他应用，例如: 1） 非集装箱（散装）行李和货舱； 2） 确保货物限制在适航批准的航空货运集装箱内。 注:大多数飞机散装舱室和许多航空货运集装箱内的连接点上的允许极限载荷显著低于22 250 N（5 000 lbf）。这导致约束装置的极限荷载能力由最弱的元件决定，即连接点:因此，典型的22 250 N极限荷载约束带将超过此类应用的要求。 遵守本文件是根据TSO/ETSO获得民航当局适航批准的一种方式- C172a，以及其中的其他要求。

This document specifies the design criteria and testing methods adequate to guarantee the ultimate load and operational dependability of cargo restraint strap assemblies with a typical 22 250 N (5 000 lbf) rated ultimate tension load capability, as used by the airline industry. These restraint straps are used in civil transport aircraft during flight for: a) cargo loaded and tied down onto airworthiness approved air cargo pallets, themselves restrained into aircraft lower deck, main deck or upper deck cargo systems and meeting the requirements of ISO 8097 (NAS 3610) or ISO 21100, or b) non-unitized individual pieces of cargo, or pieces of cargo placed onto an unrestrained ("floating") pallet into either lower deck, main deck or upper deck containerized cargo compartments of an aircraft, c) the same restraint strap assemblies can also be used in other applications such as: 1) non-containerized (bulk loaded) baggage and cargo compartments; 2) to ensure cargo restraint inside an airworthiness approved air cargo container. NOTE The ultimate loads allowable on the attachment points available in most aircraft bulk compartments and inside many air cargo containers are significantly lower than 22 250 N (5 000 lbf). This results in the restraint arrangements ultimate load capability being dictated by the weakest element, i.e. the attachment points: typical 22 250 N ultimate load restraint straps will therefore be in excess of the requirements for such applications. Compliance with this document provides one means of cargo restraint straps airworthiness approval by Civil Aviation Authorities under TSO/ETSO-C172a, in addition to the other requirements therein.