Plain English Meaning

The clues that tell you the small wing at the back of the airplane has stopped flying because of ice. Things like the control yoke shaking, the nose suddenly dropping, the controls feeling strange, or the airplane wanting to pitch down on its own — especially after you put the flaps down in icy weather.

Full Definition

The recognizable warning signs that an aircraft's horizontal tail surface (tailplane) has stalled due to ice contamination, typically including elevator buffet or vibration felt through the control column, sudden uncommanded nose-down pitching, lightening or reversal of forces, and difficulty . These symptoms most often appear when flaps are extended, is changed, or shifts during in .