What is the purpose of using a flashlight during a night preflight inspection?

Using a flashlight during a night preflight inspection serves the essential function of illuminating the aircraft's equipment and systems for a thorough check. This allows the pilot to effectively inspect various critical components, such as the fuel levels, control surfaces, and electrical systems, which are vital for ensuring the aircraft is in a safe and operational condition before flight.

Additionally, a flashlight helps pilots ensure that all exterior lights are functioning properly, which is crucial for visibility and safety during night operations. Having adequate lighting allows the pilot to spot any potential issues that might not be visible without proper lighting conditions, ensuring all preflight checks are completed thoroughly and efficiently before takeoff.