If the pre-check does not stop after 45 seconds, what should you do?

If the pre-check does not stop after 45 seconds, it indicates that there may be an issue with the fueling system or the aircraft's fuel management system. In this case, stopping the fueling process is essential to prevent potential overfilling or other hazardous situations. By hooking up external power, you can assess the situation further and potentially reset the system to clear any faults. Resuming fueling only after addressing the pre-check issue ensures safety and adherence to standard operating procedures. This systematic approach protects both the equipment and personnel involved during fueling operations.