What action is required after opening the emergency door during a land evacuation?

After opening the emergency door during a land evacuation, pulling the manual inflation handle is the required action. This step is critical because it initiates the deployment of the evacuation slide, allowing passengers to exit the aircraft safely and efficiently.

The operation of the evacuation slide is essential for a quick and orderly evacuation, especially in emergency situations where time is of the essence. By pulling the manual inflation handle, the slide inflates, ensuring it is ready for use by evacuees. This action must be completed immediately after the door is opened to ensure that passengers have a secure and swift pathway away from the aircraft.

Other options, such as notifying the crew or activating emergency lighting, may be important in certain contexts, but they do not directly facilitate the immediate evacuation process. Engaging the slide is an essential step, but it follows the action of pulling the manual inflation handle; hence, the latter is considered the primary action immediately after the door is opened.