What is the purpose of the chains used during hot seat evolutions?

The purpose of the chains used during hot seat evolutions is to secure the aircraft during maintenance. During these operations, where the aircraft is running and its systems may be active, it is crucial to ensure stability and prevent any unintended movement. Securing the aircraft with chains helps maintain its position, ensuring that both personnel and equipment are safe while maintenance checks or operational tests are conducted. This practice is vital for safety and efficiency in handling the aircraft.

Other options focus on different aspects of aircraft handling but do not accurately reflect the specific function of chains during hot seat operations. For instance, lifting the aircraft, stabilizing during towing, or holding in place during fueling involve different equipment and procedures that are not relevant to the hot seat evolution context.