Failure to clear the area 
Faulty entry procedure 
Poor planning, orientation, or division of attention 
Uncoordinated flight control application 
Improper correction for wind drift 
An unsymmetrical ground track 
Failure to maintain selected altitude or airspeed 
Selection of a ground reference line where there is no suitable emergency landing area within gliding distance 
Inability to visualize the half circle ground tracks 
Poor timing in beginning and recovering from turns