ISO 20683-2:2016适用于与民用运输飞机的前起落架连接的无牵引杆飞机牵引车（TLTV），最大坡道质量在10000至50000 kg（22000至110000 lb）之间，通常称为“支线飞机”。ISO 20683中规定了最大坡道质量更高的干线运输飞机的要求1.不适用于在其发布日期之前制造的TLTV。 它规定了一般设计要求、测试和评估要求、维护、校准、文件、记录、跟踪和责任要求，以确保牵引车产生的载荷不会超过前起落架或其转向系统的设计载荷，或降低前起落架的认证安全寿命限值，或在飞机推回和/或维护牵引操作期间引起稳定性问题。 它规定了仅用于飞机推回和登机门重新定位或维护牵引的无杆牵引车（TLTV）的要求和程序。不允许调度（操作）牵引（见第3条）。由于速度和额外的乘客、货物和燃料负载的组合，调度牵引对前起落架和飞机结构施加了更大的负载。 它不适用于与飞机主起落架连接的无杆牵引车。

ISO 20683-2:2016 is applicable to towbarless aircraft towing vehicles (TLTVs) interfacing with the nose landing gear of civil transport aircraft with a maximum ramp mass comprised between 10 000 and 50 000 kg (22 000 and 110 000 lb), commonly designated as "regional aircraft." The requirements for main line transport aircraft with a higher maximum ramp mass are specified in ISO 20683？1. It is not applicable to TLTVs which were manufactured before its date of publication. It specifies general design requirements, testing and evaluation requirements, maintenance, calibration, documentation, records, tracing and accountability requirements in order to ensure that the loads induced by the tow vehicle will not exceed the design loads of the nose gear or its steering system, or reduce the certified safe life limit of the nose gear, or induce a stability problem during aircraft push back and/or maintenance towing operations. It specifies requirements and procedures for towbarless tow vehicles (TLTVs) intended for aircraft pushback and gate relocation or maintenance towing only. It is not intended to allow for dispatch (operational) towing (see Clause 3). Dispatch towing imposes greater loads on nose gears and aircraft structure due to the combination of speed and additional passenger, cargo, and fuel loads. It does not apply to towbarless towing vehicles interfacing with aircraft main landing gear.