What equipment must not exceed 4 loading devices on the apron?

Loading carts are used on the apron for transporting baggage, cargo, or other materials to and from the aircraft. The regulation that states loading carts must not exceed four loading devices on the apron is in place to ensure safety and efficiency in the busy airport environment. Having a limited number of loading carts helps manage congestion on the apron and allows for smooth operations, minimizing the risk of accidents or interference with other vehicles and personnel.

In contrast, cargo containers, fuel tanks, and maintenance vehicles follow different guidelines and regulations that pertain to their specific functions and safety requirements on the apron. Cargo containers may be stacked or otherwise arranged according to specific procedural requirements that allow for more flexibility, while fuel tanks must adhere to strict safety regulations that do not typically limit the number of devices in the same way as loading carts. Maintenance vehicles also operate under guidelines that are specific to their maintenance tasks and do not have the same limitation as loading carts.