When landing in a crosswind there may be instances when
a wing will rise during the after landing roll. This may occur whether
or not there is a loss of directional control, depending on the amount
of crosswind and the degree of corrective action.
Any time an airplane is rolling on the ground in a crosswind condition, the upwind wing is receiving a greater force from the wind than the downwind wing. This causes a lift differential. Also, the wind striking the fuselage on the upwind side may further raise the wing by tending to tip or roll the fuselage.
When the effects of these two factors are great enough, one wing may rise even though directional control is maintained. If no correction is applied, it is possible that a wing will rise sufficiently to cause the other one to strike the ground.
In the event a wing starts to rise during the landing roll, the pilot should immediately apply more aileron pressure toward the high wing and continue to maintain direction. The sooner the aileron control is applied, the more effective it will be. The further a wing is allowed to rise before taking corrective action, the more airplane surface is exposed to the force of the crosswind. This diminishes the effectiveness of the aileron.