Final answer:
The FUEL control panel check is performed during the pre-flight inspection phase to ensure all fuel systems are operational before takeoff.
Step-by-step explanation:
The FUEL control panel check is typically conducted during the pre-flight inspection phase of an aircraft's operation. This check is critical in ensuring that all the systems related to fuel, such as pumps, gauges, and fuel management systems, are functioning properly before takeoff. It includes verifying the quantity of fuel, checking for any possible leaks, and ensuring the correct fuel grade is being used for the specific aircraft. Additionally, crew members confirm that the fuel systems' indications are within operational parameters and that all the related switches and controls are set correctly for the planned flight.