For example, if an aircraft is rated for ETOPS-180, it means that it is able to fly with full load and just one engine for three hours.参考译文:ETOPS认证是一个两步过程。首先,机身和发动机组合必须在其类型认证期间满足基本的ETOPS要求。这被称为“ETOPS类型批准”。此类测试可能包括关闭一个发动机...