(Cottage Grove, OR) -- An investigation is ongoing into a small plane crash in Lane County over the weekend. Authorities say the plane went down in a field north of Cottage Grove Sunday. A caller to 9-1-1 reported a person sitting in a field next to an airplane. South Lane Fire and Rescue treated the pilot for minor injuries. The single-engine plane suffered major damage to front of the aircraft. The NTSB is investigating the cause of the crash.