How do you perform a static engine run?

Performing a static engine run involves powering up the engines and allowing them to run at idle without any movement of the aircraft. This procedure is critical for conducting various system checks and diagnostics while ensuring safety. The emphasis during a static run is on monitoring the performance of the engines and inspecting systems such as fuel flow, oil pressure, and engine temperature, all while the aircraft remains stationary.

This method enables maintenance personnel to closely observe engine behaviors and troubleshoot any potential issues without the dangers associated with moving aircraft. Static engine runs are a routine part of aircraft maintenance and are essential for validating engine performance prior to flight operations.

The other options describe scenarios that may not align with standard practices or safety protocols for engine testing and observation. For instance, running the engines at full throttle while the aircraft is on the runway is typically categorized as a dynamic or taxi run, not static. Performing tests with the aircraft in motion might not provide accurate data due to variations in airspeed and ground conditions. Disconnecting all power sources before starting the engine is not standard practice, as certain systems need power to perform pre-start checks and ensure a safe startup sequence.