What is the first procedure for grounding an aircraft?

The first procedure for grounding an aircraft involves ensuring a safe electrostatic discharge path before performing any operations. Grounding the aircraft first is crucial because it helps to dissipate any built-up static electricity that can pose a danger during fuel operations and other maintenance tasks. By connecting the grounding cable securely to the aircraft, you establish a pathway that prevents electrical charges from accumulating, reducing the risk of sparks that could ignite fuel vapors or cause damage to the aircraft systems.

In aviation safety procedures, grounding is a fundamental step that prioritizes personnel safety and prevents accidents related to static discharges. This is particularly important before refueling or conducting electrical system work. The other options, while related to safety in aircraft operations, do not address grounding in the correct initial sequence needed to ensure safety effectively.