BOISE, Idaho — The pilot of a helicopter that was responding to a small wildfire in central Idaho before crashing in the Sawtooth National Forest survived and was able to hike to a waiting ambulance, officials said. “Our pilot was on board and survived, and an investigation is underway,” U.S. Forest Service spokesperson Angela Hawkins said Friday morning. …The Custer County Sheriff’s Office said the pilot was able to call 911 and that he was able to hike out with assistance to an ambulance that responded from the nearby town of Stanley. The Forest Service and the National Transportation Safety Board will investigate the incident, Hawkins said. The helicopter incident came one day after a single-engine firefighting aircraft crashedinto a reservoir near Helena, Montana, while scooping up water to fight a different blaze, killing the pilot. That crash is also under investigation.