What is the required wait time after the second engine start on the ground?

After the second engine start on the ground, a wait time of 10 seconds is required before proceeding with the next steps. This wait time is critical for allowing any residual fuel to clear and enabling the engine to stabilize properly.

The 10-second interval ensures that the engine has sufficient time to complete its start cycle safely and correctly. This precaution helps prevent complications that can arise from starting the engine too soon, which may include issues like flooded conditions or incomplete combustion.

This principle applies to various aircraft operation procedures, where adhering to specific time frames during engine start sequences is integral to ensuring smooth and safe operation. Understanding these protocols instills good habits and enhances pilot proficiency.