[DOC] [TLE] Wind Shear - FAASafety.gov [PAR] the aircraft that they crashed into the approach lights on a perfectly clear day? ... 
Wind shear is a change in wind speed and/or direction over a short distance. ... 
vertically and is most often associated with strong temperature inversions or 
density gradients. ... sudden change in wind velocity can seriously affect a 
landing. [DOC] [TLE] Aircraft Flight Safety and Fear of Flying: Basic Aerodynamic ... [PAR] Pilots often describe this as pulling +Gz. This force is measured in units of gravity 
.... Thunderstorms, as I mentioned above, can cause big problems for airplanes 
flying ... If the aircraft is just about to land and suddenly the wind changes to a tail 
wind, ... a matter of changes in wind speed, not radical changes in wind direction. [DOC] [TLE] Turns, Wind and Airspeed | Left Seat [PAR] Feb 4, 2014 ... For most airplanes the wind caused change of airspeed in a turn will be too .... 
When the air suddenly changes its speed and/or direction, it takes the airplane 
some ..... Unfortunately, many of his articles have technical flaws, and often ... The 
downwind turn is a ground referenced problem as described in... [DOC] [TLE] Wind shear - Wikipedia [PAR] Wind shear, sometimes referred to as windshear or wind gradient, is a difference 
in wind speed and/or direction over a relatively short distance in the atmosphere. 
Atmospheric wind shear is normally described as either vertical or horizontal 
wind shear. Vertical wind shear is a change in wind speed or direction with 
change in ... Wind shear has a significant effect during take-off and landing of 
aircraft due... [DOC] [TLE] chapter 5 - weather - AeroTransport.com [PAR] Nav Canada hosts the Aviation Weather Website, which enables pilots and other 
aviation ... In fact, if the pressure were suddenly released, the .... Northern 
Hemisphere, this rotation causes air to deflect to the right of its normal path. .... 
Wind shear is best described as a change in wind direction and/or speed within a 
very... [DOC] [TLE] Weather answers: Aviation weather questions - usa today [PAR] A: All weather, including wind speeds and direction at the surface and aloft, ... 
Some pilots also learn how to solve the same problem "backwards. ... that a jet is 
constantly updating on it's airspeed, ground speed, heading and course, .... 
Propeller aircraft will experience a different sound if the relative wind changes 
abruptly... [DOC] [TLE] Chap 7-9 [PAR] Dense, banded cirrus, which often are turbulent, are discussed in chapter 13. ... 
Very little turbulence, but can pose a serious icing problem if temperatures ... Just 
as an air mass took on the properties of its ... changes across a front. Wind dis- 
continuity may be in direction, in speed, ... The relatively sudden change in wind. [DOC] [TLE] Exam 3 - Review.doc - Arizona State University [PAR] ***Wind shear is best described as a change in wind direction and / or speed 
within a ... suspected low-level wind shear, a sudden decrease in headwind will 
cause a loss ... rolls upward as a vortex ring which rolls upward along its outer 
boundary. ***An aircraft that encounters a headwind of 45 knots with a microburst 
may... [DOC] [TLE] How dangerous is flying in high winds? - Telegraph - The Telegraph [PAR] Jan 14, 2015 ... The sight of planes swaying in gales is unlikely to encourage nervous fliers. ... 
says that the difficulty of landing in high winds depends on both wind speed and 
direction. ... This is a sudden change in wind speed and/or direction, causing ... 
for its high winds, and often hosts trainee pilots for landing practice. [DOC] [TLE] Prevailing Winds - (ALLSTAR) Network [PAR] May 4, 2008 ... The pressure gradient is often strong enough for a wind to blow from the water to 
the land. ... Wind direction changes as the air flows around hills. .... isobars and 
its speed is greater than the surface wind, this transfer causes .... passes causes 
serious wind shear problems for aircraft approaching to land at... [DOC] [TLE] Turbulence: The Invisible Hazard -

Question: Often causing difficulties for aircraft, it's a sudden change in wind direction & speed
Answer: shear