Undersheriff Bruce Riley identified the victims in the Monday afternoon crash as 46-year-old Timothy Dean Carter of Portland and 45-year-old Jeff Earl Kropf of Halsey. Both died on impact.
Riley says Carter owned the aircraft and had a private pilot's license. Kropf had a commercial pilot's license.
The undersheriff says witnesses report that the plane was turning to the left over state Highway 226 when part of the wing separated from the plane and fell onto the highway. The aircraft came down in a cow pasture.
The plane was a two-seat experimental RV6 built in 1996. Investigators believe it took off from the Lebanon Airport shortly before the crash on a pleasure flight.
Debris closed a section of Highway 226 for about four hours.