What is a crucial step after loading weapons on the F/A-18 E/F?

The crucial step after loading weapons on the F/A-18 E/F is to perform a weight and balance check. This process is essential because it ensures that the aircraft's center of gravity remains within safe limits after the addition of the weapons. Proper weight distribution is critical for maintaining stable flight characteristics, as it affects the aircraft's performance during takeoff, navigation, and landing.

When weapons are loaded onto the aircraft, they add significant weight and can alter the center of gravity. If the aircraft is not balanced correctly, it can lead to difficulties in control, increased drag, and could even result in an adverse flight condition during critical phases of flight. Therefore, conducting a weight and balance check is a vital part of pre-flight preparations to ensure safety and operational effectiveness.

While assessing fuel levels, checking electrical systems, and calibrating flight controls are all important maintenance procedures, the weight and balance check directly addresses the immediate consequences of weapon loading, making it the most crucial step in this context.