Why might an aircraft require a jettison system beyond the maximum landing weight?

An aircraft may require a jettison system beyond the maximum landing weight primarily to ensure a safe landing. In scenarios where an aircraft has to return to the airport shortly after takeoff or experiences an emergency, it may not be able to safely land at its current weight. Landing an aircraft above its maximum landing weight can compromise structural integrity and performance, leading to potential issues such as tire blowouts or landing gear failure.

A jettison system allows pilots to intentionally release fuel or cargo in a controlled manner, thereby reducing the aircraft's weight to within safe limits. This procedural capability is critical during emergency situations, as it enhances the aircraft's handling characteristics and ensures compliance with safety standards for landing.