During the landing roll, wheel barrowing can occur if you touch down on the main wheels and the nose wheel simultaneously while holding excessive speed, and then add forward pressure to the yoke. Wheel barrowing will not occur if the pilot maintains the correct speed, and touches down main wheels first, then gently lowers the nose wheel.
In nose wheel airplanes, a ground loop is almost always a result of wheel barrowing. The pilot must be aware that even though the nose wheel-type airplane is less prone to ground looping, virtually every type of airplane, including large multiengine airplanes, can be made to ground loop when sufficiently mishandled.
Do you want to know more? The Airplane Flying Handbook and other FAA manuals are available here.
