What does "fuel flow" indicate in an aircraft system?

Fuel flow in an aircraft system refers to the rate at which fuel is delivered to the engine, which is crucial for maintaining optimal engine performance. This measurement is vital for pilots and engineers as it ensures that the engine receives an adequate supply of fuel to operate effectively and efficiently under various conditions. Monitoring fuel flow helps in diagnosing potential issues within the fuel system, such as blockages or pump failures, which can affect engine operation. Understanding and managing fuel flow can also play a significant role in fuel efficiency and overall flight safety, making it a fundamental concept in aviation fuel systems.