What is the purpose of a preflight checklist?

The purpose of a preflight checklist is fundamentally to ensure that all aircraft systems are operational and safe before flight, which is critical for the safety of the flight and those on board. The preflight checklist serves as a systematic approach to verifying that all necessary procedures and checks have been accomplished. This includes inspecting critical systems such as the flight controls, electrical systems, fuel systems, and communication systems, among others. By using a checklist, pilots can minimize human error and ensure that no essential steps are overlooked in the preflight process.

While calculating weight and balance, verifying fuel levels, or providing navigation details may be aspects of the overall flight preparation, the core objective of the preflight checklist is centered on operational readiness and safety, making it an essential practice in aviation.