Phases of Flight Delta Assessment Practice Test

The key idea is knowing how the door’s escape slide status affects operations at the door. On the ground during boarding, you want the door to be disarmed so that opening it won’t accidentally release the emergency slide. This keeps personnel and passengers safe while everyone is moving about the cabin. The slide is armed only when the aircraft is prepared for departure, so it will deploy if an evacuation becomes necessary. Arming the door prematurely would risk unwanted slide deployment during boarding, while simply being unlatched or locked describes whether the door itself can be opened, not whether the slide will deploy. Therefore, checking that the door is disarmed is the correct action.