What potential hazard is present if multiple personnel are on the airstair?

When multiple personnel are on the airstair, the potential hazard of instability arises. Airstairs are designed to carry a specific load, and exceeding that load by adding several individuals can compromise the structure's integrity, resulting in a higher risk of tipping over or collapsing while in use. This could cause severe injuries to those on the airstair and others nearby.

In aviation safety, recognizing the limits of equipment and ensuring that personnel adhere to safety protocols is crucial. The airstair's stability diminishes significantly with excessive weight or movement, which could lead to accidents during boarding or deplaning processes.

In contrast, the other options suggest benefits that don't apply to this situation. Increased visibility, enhanced efficiency, and decreased stress may be advantageous in various contexts but do not address the inherent risks associated with overloading the airstair. Therefore, the focus must remain on the stability and safety of personnel using such equipment.