(Portland, OR)  --  Search efforts are underway for a small plane believed to have crashed down in a remote area of the Mount Hood National Forest near Estacada.  The Clackamas County Sheriff's Office says they received a report from aircraft controllers that a Cessna 150 may have crashed Monday morning.  Authorities say 44-year-old Jared Scott Sabin of Salem and his son Gavyn Scott Sabin were on board the plane.  The two had reportedly planned on stopping in Troutdale before flying on to Idaho and Utah.  Aircraft controllers say they lost contact with the plane a few minutes after the pilot reported they'd run into bad weather and that ice was forming on the plane.  Crews still haven't found any wreckage.