求翻译：在飞机离开廊桥之前，飞行员都要完成详细的、有步骤的程序，检查飞机的安全和适航性，其中包括系统全面检查。是什么意思？

The plane left before the bridge, the pilots are detailed and systematic procedure, checking aircraft safety and airworthiness, including comprehensive inspection of the system.