Wind shear = a rapid change in wind speed and/or direction over a short distance. It’s not “bumpy air.” It’s a sudden shift in energy relative to the wing. And near the ground, that matters. What happens aerodynamically 👇 Lift depends on relative wind. If you’re on approach at VAPP and suddenly lose a 20-knot headwind component: • Airspeed drops instantly • Lift decreases • Sink rate increases • Thrust lags behind demand You didn’t change pitch. The air mass did. That’s why low-level wind shear