What occurs to the aircraft's position during an approach with decreased performance shear?

During an approach with decreased performance shear, the aircraft's position typically sinks below the glide path. This phenomenon can occur due to various factors, such as adverse weather conditions affecting the aircraft's performance, such as wind shear or turbulence.

When performance shear is decreased, the aircraft struggles to maintain the required altitude and airspeed, possibly leading to a descent below the intended glide path. Understanding this behavior is essential for pilots, as it influences how they should manage their descent and adjust their approach profile to ensure a successful landing.

By recognizing that decreased performance shear can lead to a loss of climb capability or increased sink rates, pilots can take proactive measures to adjust their flight path accordingly, maintaining safety during the landing phase.