The NTSB says an emergency locator beacon was activated by a Pilatus PC-6 Porter on Friday near Merrill Pass at a higher elevation. Bad weather has been making it difficult for crews to search the mountainous region. FacebookTwitterEmailPrintFriendly分享The Alaska Air National Guard and the National Transportation Safety Board are searching a plane and pilot believed to be missing in Lake Clark National Park. The search continues. Only the pilot was aboard the plane, which departed Lake Hood airport in Anchorage on Friday and was destined for Port Alsworth. The pilot’s identity has not been released.