What is required to facilitate passenger evacuation through the entry door during a fire?

To facilitate passenger evacuation through the entry door during a fire, it is essential for both the jet bridge and stairs to be in place. This setup ensures that passengers have a safe and efficient means of exiting the aircraft. In the event of a fire, the immediate concern is to enable a rapid evacuation while also maintaining a clear path for passengers to reach safety.

The presence of a jet bridge provides a direct access route to the terminal, while stairs may be needed for situations where the aircraft is parked away from the terminal or certain configurations of the airplane. Thus, having both access points available maximizes the options for quick and safe evacuation depending on the circumstances.

While emergency lighting is crucial for general visibility during an evacuation and manual slides may be used in some scenarios, these options do not provide the necessary infrastructure for facilitating passenger movement as securely as having both the jet bridge and stairs in place would.