West Virginia National Guard Lt. Col. Mike Cadle says military crews circling overhead are in touch with the aircraft.
Trees at the crash site were too thick to land a helicopter, but medical crews were lowered to the site.
A Navy news release says that there were "several" injuries among the 17 people aboard. There were no deaths.
The helicopter took off from Fort Pickett in Virginia as part of a training exercise involving the Navy and National Guard. It was headed to Camp Dawson near Kingwood, West Virginia.
It took rescue crews more than four hours to reach the crash site.