What should be done prior to introducing fuel during Battery Start?

Before introducing fuel during a battery start, it is crucial to wait for maximum motoring, specifically reaching a minimum of 13% N1. This is because achieving this threshold indicates that the engine is properly spinning and is prepared for fuel introduction. At this point, the engine has begun its necessary rotational movements, which are essential for igniting the fuel and sustaining a stable start.

Introducing fuel to the engine before reaching this optimal motoring speed could lead to difficulties in starting, including potential engine flooding or reduced efficiency in the combustion process. Therefore, ensuring that the engine is properly motoring before fuel introduction maximizes the chances of a successful and smooth start, reducing the risk of complications during the ignition phase.