Under what conditions are passengers allowed to board an aircraft that is being refueled?

Passengers are allowed to board an aircraft that is being refueled under specific safety conditions. The correct answer indicates that this is permissible when airline personnel are on board and passengers are loading and unloading on the opposite side of the aircraft. This scenario ensures that there is oversight and control over the boarding process, minimizing the risk associated with refueling operations.

Having airline personnel present helps maintain safety protocols and communication between the ground crew and the airline staff. Additionally, loading and unloading on the opposite side of the aircraft reduces the risk of exposure to potential hazards arising from refueling activities, such as fuel spills or ignition sources. This practice is important in maintaining a safe environment for both the passengers and the crew.

Other conditions presented, such as waiting for a flight delay or limiting activities to only daytime hours, do not directly address the critical safety element of active supervision and controlled access during refueling. The completion of refueling is a standard safety measure, but the presence of personnel and proper boarding conduct are vital to ensuring that passengers are not in a hazardous situation while the aircraft is being serviced.