How many boarding bridge tires must be inside the Stow Box area prior to aircraft arrival?

The correct answer is that two boarding bridge tires must be inside the Stow Box area prior to an aircraft's arrival. This requirement is based on safety protocols that ensure the stability and functionality of the boarding bridge when the aircraft is being serviced.

Having two tires within the Stow Box area helps to distribute the weight evenly, providing a more secure and stable connection between the aircraft and the terminal. It also allows for proper maneuverability and alignment of the boarding bridge, which is crucial for facilitating safe passenger boarding and disembarking.

Additionally, having two tires ready and properly positioned ensures that if any operational adjustments need to be made during the aircraft's arrival and connection process, the boarding bridge remains functional and stable. This setup is part of the standard operating procedures intended to enhance safety for both passengers and crew during the boarding process.