What is the third step in the MED operation procedure?

In the context of the MED (Manual Emergency Door) operation procedure, the correct answer focuses on a critical phase in the emergency egress process. The third step involves pushing the door out through the door frame. At this juncture, after preparing the door for exit, physically pushing the door open is essential for ensuring a clear and safe pathway for evacuation.

This action is vital because it directly affects the safety and efficiency of the evacuation. Once the door is properly handled and opened, it allows passengers and crew to exit the aircraft quickly in an emergency situation. Following the proper sequence of steps is crucial for maintaining order and minimizing panic during an evacuation.

While other options relate to the steps involved in the overall procedure, they either precede or follow the act of pushing the door open. It emphasizes the importance of understanding the sequence and the specific actions required to ensure a successful emergency exit, thereby enhancing safety for all individuals involved.