NTSB: Air ambulance had repairs before Elko crash in 2016

Elko, Nev. • Federal investigators say an air ambulance that crashed after takeoff in Elko in November 2016 was repaired three times in the six weeks before it went down, killing all four people on board.But the National Transportation Safety Board said Friday there was no evidence of mechanical malfunction or engine failure when the twin-engine aircraft bound for a Salt Lake City hospital crashed near the Elko airport.The NTSB said earlier a witness reported the plane operated by American