Transportation safety board beginning 2006 of hearings . EMS examines reported `` drastic increase '' in accidents and deaths . 35 air ambulance crashes killed 35 people during 2006 period . Flying at night in poor weather conditions likely contributed to the crashes in Texas and Alaska of three medical helicopters that killed 11 people , the NTSB said . Board 's four days safety recommendations not fully implemented , it says .
Transportation safety board beginning 2006 of hearings . EMS examines reported `` drastic increase '' in accidents and deaths . 35 air ambulance crashes killed 35 people during 2006 period . Board 's four days safety recommendations not fully implemented , it says .