ISO 7718-2:2016规定了未来民用客运飞机上层乘客舱门周围的最小尺寸和无障碍空间要求，这些舱门旨在与世界各地机场规划的乘客登机桥兼容。 本文件不适用于民用运输机的现有型号，或2000年前投入使用且机身相同的衍生型号，对于这些型号，乘客登机桥或乘客中转车辆的飞机配合部分预计将与ISO 16004兼容。然而，除本文件外，预计在设计能够提供上层服务的乘客登机桥时，可考虑此类飞机类型的设计。 本文件无意以任何方式限制任何未来类型民用客运飞机的基本设计。然而，它的目的是向飞机设计工程师澄清设计特点，这将使新型飞机难以或不可能与机场乘客登机桥充分连接。如果基本飞机设计要求对未来模型施加了不符合本文件的某些尺寸特征，请注意: -需要实施乘客上下机的替代方法，如使用飞机内部楼梯等。； -或在此类新型飞机运行的机场的上层乘客登机桥将需要一定程度的修改/返工； -或需要额外的接口装置/设备，以便将此类新型飞机与现有上层乘客登机桥连接起来。 每种情况都会导致飞机操纵限制和运营成本增加。

ISO 7718-2:2016 specifies the minimum dimensional and unobstructed space requirements around future civil-passenger transport aircraft upper deck passenger doors when they are intended to be compatible with passenger boarding bridges planned in airports worldwide. This document is not applicable to existing models of civil transport aircraft, or derivative models with entry into service up to year 2000 with the same fuselage, for which the aircraft-mating section of passenger boarding bridges or passenger transfer vehicles is expected to be compatible with ISO 16004. However, it is expected that the design of such aircraft types may be taken into account for design of passenger boarding bridges capable of upper deck servicing, in addition to this document. It is not the intent of this document to restrict in any way the basic design of any future types of civil-passenger transport aircraft. It aims, however, at clarifying for aircraft design engineers the design characteristics which would make it difficult or impossible for a new type of aircraft to adequately connect with airport passenger boarding bridges. Should basic aircraft design requirements impose on a future model certain dimensional characteristics not complying with this document, note that: - either alternative methods of embarking/disembarking passengers will need to be implemented, such as using the internal aircraft stairs, etc.; - or upper deck passenger boarding bridges in the airports where such a new type of aircraft is to operate will require some degree of modification/reworking; - or additional interface devices/equipment will be required in order to connect such a new type of aircraft with existing upper deck passenger boarding bridges. Each case results in increased aircraft-handling constraints and operating cost.