What is the second jump command in the sequence for a UH-60?

The second jump command in the sequence for a UH-60 is indeed to check static lines. This command is critical as it ensures that all jumpers have properly secured their static lines, which are essential for deploying the parachute once they exit the aircraft. Checking static lines at this stage helps prevent complications during the jump and ensures safety, as a disengaged or tangled static line can lead to malfunctions in parachute deployment.

The sequence of commands during an aircraft exit is systematic and designed to maintain safety and organization among jumpers. The phrase "check static lines" follows other preparatory commands and emphasizes the importance of double-checking gear before the jump occurs. This vigilance is vital to a successful jump operation, and ensuring all jumpers are ready with their static lines in order reinforces team coordination.

In contrast, commands such as "check equipment," "sit in the door," and "stand by" serve different purposes either prior to exiting or in preparation not specifically tailored to the immediate action of jumpers securing their static lines. Each command in the sequence builds on the previous ones to maintain operational safety and efficiency during parachute operations.