Where should the four axle trailer retaining pins on a mobile aircraft arresting system be stored once they have been removed?

The retaining pins for the four axle trailer of a mobile aircraft arresting system should be stored in the front storage box after removal. This storage solution is ideal because it ensures that the pins are kept in a designated area, reducing the risk of loss or damage. The front storage box is designed to securely hold essential components, providing easy access when needed and keeping the pins organized.

Storing the pins under the trailer or in the cockpit would not provide a secure or appropriate environment, potentially leading to safety hazards or loss of equipment. Additionally, storing them in the maintenance shed may not guarantee their immediate accessibility and also risks the chance of being misplaced or damaged among other tools or equipment. Therefore, the front storage box is the most suitable and secure location for these components.