While flying a 3° glide slope, what condition should the pilot expect if a constant tailwind shears to calm wind?

When flying on a 3° glide slope, a transition from a constant tailwind to calm wind will alter the airflow over the aircraft. Initially, the tailwind assists the aircraft, providing additional groundspeed. As the wind shifts to calm, the loss of this tailwind effect means that the aircraft's groundspeed decreases. However, the aircraft will continue to maintain its airspeed due to inertia and the ongoing thrust provided by the engines.

As a result, pilots will observe a relative increase in airspeed and a change in pitch attitude. This situation can lead to the aircraft climbing above the intended glide slope, as the reduction in tailwind and the persistence of airspeed combined create a moment where the aircraft is essentially "over-trimmed" for the current glide path. If the aircraft does not descend correspondingly, this can cause it to deviate from the glide slope.

This understanding of aerodynamic principles is essential for maintaining an accurate approach and ensuring safe landing practices. Thus, the choice indicating that airspeed and pitch attitude increase, possibly causing the aircraft to go above the glide slope, accurately reflects the expected condition during this wind change scenario.