安全检查单的目的是确定飞机系统是否处于可以安全的
给飞机汇流条加载（）的形态。The purpose of safety checklist is to determine if aircraft systems are in a configuration to safely apply ( ) to the aircraft buses.

L COWL A/I DUCT 警告信息 (红色)含义是？

NOSE DOOR OPEN警告信息 (红色)含义是？

L ENG OIL PRESS 警告信息 (红色)含义是？

CONFIG AILERON 警告信息 (红色)含义是？

ANTI-ICE DUC警告信息 (红色)含义是？

CDU上显示的断点A discontinuity displayed on the CDU:

改变4200FMS上的起始机场，ACT/MOD FPLN 页会Changing the ORIGIN airport on the 4200 FMS , ACT/MOD FPLN page will:

导航数据库多久更新一次？How often must the navigation database be updated?

RAIM用于：RAIM is used to:

判断正误True or False：依据庞巴迪发布的《飞机飞行手册》限制章节规定，目前CRJ900机型禁止使用FMS的自动低温补偿功能。According to the LIMITATIONS section of AFM issued by Bombardier, the FMS function of automatic cold temperature compensation is prohibited for CRJ900 aircraft at present.