This is the classic high sink rate, hard landing. The most hazardous form of wind shear is that encountered in thunderstorms. The severe, sudden wind changes can exceed the performance capabilities of many sophisticated aircraft. There have been numerous documented cases of aircraft mishaps directly related to encounters with thunderstorm wind shear. Figure 5 Moderate Shear-Altitude sufficient to effect recovery Loss of indicated air speed is equivalent to shear value.
Lift is loss, aircraft pitches down, drops below glide slope.
Pilot applies power to regain speed, pulls the nose up and climbs back to the glide slope. Probably overshoots the glide slope and target air speed but recovers and lands without difficulty. Loss of indicated air speed is equivalent to shear value. Lift is lost, aircraft pitches down, drops below glide slope. Pilot applies power to regain speed, pulls the nose up tp climb back to glide slope.