When should you perform an engine run-up check?

Performing an engine run-up check before all flights as a routine practice is crucial for ensuring the aircraft's engine is functioning properly. This procedure typically includes tests of various engine components, such as the magnetos, fuel system, and engine instruments, to confirm that everything is operating as expected before departure. This proactive step helps identify potential issues that could compromise safety during flight.

In addition to enhancing safety by detecting malfunctions early, completing a run-up prior to all flights sets a consistent standard for pre-flight checks, ensuring that pilots are familiar with the engine's response and the aircraft's systems before takeoff. This consistency is a vital aspect of aviation safety and professionalism, equipping pilots with the confidence needed for a safe flight.

While an engine run-up is indeed necessary after maintenance and may be beneficial before flying in adverse weather, these instances are secondary to the routine practice of conducting a run-up check before every flight. Furthermore, a prolonged flight does not necessitate a run-up unless specific indicators suggest a problem, emphasizing the importance of a regular check regardless of the flight duration or conditions.