Narrative:

Runway excursion due to temporary loss of control (instructional). Shortly after landing; directional control was lost resulting in a runway excursion off hard surface runway onto grass. Suspected cause: student stiffness on rudder pedals at time of touchdown.

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Original NASA ASRS Text

Title: PA28B-235 Instructor reported loss of control and runway excursion when student froze on the rudder pedals.

Narrative: Runway excursion due to temporary loss of control (instructional). Shortly after landing; directional control was lost resulting in a runway excursion off hard surface runway onto grass. Suspected cause: student stiffness on rudder pedals at time of touchdown.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.