C172 solo student and observing instructor reported the student experienced a runway excursion during landing roll. Aircraft was towed from the runway.
Synopsis
C172 solo student and observing instructor reported the student experienced a runway excursion during landing roll. Aircraft was towed from the runway.
Narrative
A student pilot was performing a second solo flight. The first solo was Day 0. Two takeoffs and landings were made with me; the instructor; prior to the student flying solo on this day. The student had already completed one full stop landing. The second approach and landing were uneventful. The airplane touched down at the thousand foot markers; and began to slow. After some ground roll; the solo student added a couple hundred RPM of power to continue taxiing down the runway to the next available taxiway. The aircraft began to yaw to the left on the ground. The student applied full right rudder; to no effect. While applying right rudder; she began to apply the brakes. Skid marks show that the tires slipped; and the airplane turned thirty degrees left from the centerline; then straightened; then began to turn right before the left main and nose wheel impacted the snow. Just before impact; the student ceased the right rudder input but continued to apply the brakes. The speeds at the time of the initial left yaw and impact of the snow are unknown; but there were no injuries and impact with the snow was relatively light and did not cause whiplash or large accelerations. The airplane appears to have rolled through the snow for approximately 30 feet before coming to rest. No damage was visible. When the aircraft was towed from the runway; the nose strut was fully extended; locking the nose wheel steering.
Second reporter narrative
After landing on runway XX at ZZZ. The aircraft was moving forward on the runway. It started to move to the left. Right rudder and breaking was applied; but the aircraft kept moving to the left. Power was pulled and breaking on both feet occurred. Aircraft's front wheel and left wheel went into the snow on the side of runway. Afterwards; left tire seemed to be locked; maintenance was unsure if this occurred before the incident; or due to the snow.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.