InstrumentsPreview
Open in TheBrain

Wind Shear

can be found on all sides of a thunderstorm cell and in the downdraft directly under the cell

4135

constant tailwind shears to a calm wind

  1. airspeed and pitch increase
  2. a tendency to go above the glide slope

note: same effect when a tailwind shears to a headwind

4727

headwind shears to a constant tailwind

  1. airspeed decreases
  2. the nose pitches down
  3. aircraft will begin to drop below the glide slope
  4. thrust must be increased initially to resume normal approach speed
  5. thrust is reduced as the airspeed stabilizes, vertical speed increases
  6. indicated airspeed decreases and then increases to approach speed.

4739 4755

LLWS

Low-level wind shear may result from a frontal passage, thunderstorm activity, or low-level temperature inversion

4150