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.
Nose up trim may have been used. When airspeed is regained, thrust required is less than required for previously existing head wind. Thrust is not reduced as quickly as required, nose-up trim compounds the problem, airplane is climbed back above glide slope. Airplane lands long and fast. Figure 7 Shear of sufficient magnitude and at an altitude too low to effect recovery.