What happened
The incident occurred during a training flight involving a certified flight instructor and a student pilot. As the aircraft was operating on the runway, the student began to drift toward the left side of the centerline. Recognizing the deviation, the certified flight instructor initially attempted to correct the situation by providing verbal instructions to the student.
When the verbal corrections proved ineffective and the aircraft continued its leftward drift, the instructor decided to intervene physically. He attempted to take control of the aircraft from the student pilot. However, the student maintained firm pressure on the left rudder pedal. The instructor was unable to overpower this input, resulting in a loss of directional control.
Consequently, the aircraft departed the paved surface on the left side and entered a snowbank. The force of the impact caused the nose gear to collapse, leading to a nosedown attitude for the aircraft.