Incident Overview
A certified flight instructor (CFI) and commercial pilot reported that the landing on an 8,200 ft by 100 ft asphalt runway was normal. During the landing rollout, the airplane began to drift to the left. The pilot applied left rudder to compensate for the drift. Subsequently, the airplane entered a left skid. At that point, the pilot applied opposite rudder but to no avail, and the airplane ground looped and exited the runway environment.
Runway Evidence
The operator reported that skid marks were evident on the runway, extending approximately 150 ft from the airplane's resting point, which was located adjacent to the runway's high-speed turnoff.
Aircraft and Pilot Information
The pilot was a CFI and commercial pilot. No further details about the aircraft, registration, date, location, occupants, or injuries were provided in the source material.