What occurs when an aircraft engages the pendant on an E-5 Arresting system?

When an aircraft engages the pendant on an E-5 Arresting system, a critical safety mechanism is activated, specifically the shear pins. Shear pins are designed to break under a certain load, providing a controlled release that allows for the arresting system to function effectively. When the aircraft's hook engages the pendant, the ensuing force will exceed the threshold of the shear pins, causing them to snap. This breakage then enables the energy absorption feature of the arresting system, which helps to bring the aircraft to a stop safely.

The process is essential for ensuring that the aircraft is decelerated without causing damage to the aircraft or the arresting system itself. This action protects the aircraft and crew and ensures a safe landing, particularly in situations involving emergency landings or a shortcut to halting the aircraft's speed upon landing. The other possibilities concerning the activation of shear links, net lifting, or automatic stopping of the aircraft do not accurately describe the mechanism of engagement with the E-5 Arresting system.