Tag Archives: turbulence

An aircraft is maintaining FL 150 within airspace class C. Another aircraft below at FL 140 is receiving a clearance to descend to FL 70. It is severe turbulence in the area. When is the earliest that a clearance to descend to FL 140 or below can be expected?

A: When the other aircraft has reported that it has descended through FL 130
B: When the other aircraft has reported that it has left FL 140
C: When the other aircraft has reported that it has reached FL 70
D: When the other aircraft has reported that it has left FL 120

 

 

 

 

 

Answer: A

The turbulence which occurs at high flight levels (above FL 250) is mainly of the type Clear Air Turbulence. In what way can moderate to severe Clear Air Turbulence affect an aircraft, the flight and the passengers?

A: The turbulence can be resembled with the roughness of a washing-board (small scale) and will not have influence on the aircraft and its solidity, but will make flight a little more difficult. The passengers will seldom notice anything of this turbulence.
B: The turbulence is a large scale one (waving) so that the aircraft will be difficult to manoeuvre. The passengers will feel some discomfort.
C: The turbulence is a small scale one and can cause damage. The manoeuvring of the aircraft will be made more difficult or even impossible. For the passengers the flight will be unpleasant.
D: The turbulence is wave like which makes the flight unpleasant for the passengers but the manoeuvring will not be affected essentially.

 

 

 

 

 

 

 

 

Answer: C

When shall an aircraft in the heavy-wake-turbulence category include the word “Heavy” immediately after its call sign e.g. Fastair 345 heavy:

A: Never
B: In all calls
C: In the initial call to the aerodrome control tower and the approach control unit
D: In all calls to the aerodrome tower and the approach control unit

 

 

 

 

 

 

 

 

Answer: C