FAA Aircraft Dispatcher Practice Exam

What does LLWS stand for and why is it dangerous?

1. Low Level Wind Shear; it causes turbulence during cruising

2. Low Level Wind Shear; it can cause sudden changes in wind speed and direction

3. Light Level Wind Shear; it affects only small aircraft

4. Low Level Wind Shear; it occurs only during thunderstorms

The correct answer is: Low Level Wind Shear; it can cause sudden changes in wind speed and direction

LLWS stands for Low Level Wind Shear, which is a particularly dangerous meteorological phenomenon. It refers to a sudden and significant change in wind speed and/or direction at low altitudes, typically within a few thousand feet of the ground. This characteristic makes LLWS particularly perilous during takeoff and landing phases of flight when aircraft are most vulnerable to changes in their flight path and performance. The danger associated with LLWS lies in its ability to induce rapid and drastic alterations in an aircraft's trajectory, which can lead to a loss of control if not managed properly. Pilots rely on predictable wind conditions during critical phases of flight, and LLWS can disrupt this expectation, resulting in turbulence or unexpected altitude changes. Understanding LLWS allows pilots and dispatchers to take necessary precautions by checking weather reports and alerts, thereby enhancing flight safety. In contrast to other misconceptions, it is not limited to turbulence during cruising or only affecting small aircraft, nor does it only occur during thunderstorms. These points detail the incorrect options and highlight the necessity of proper knowledge regarding Low Level Wind Shear for effective flight operations.