On 25 February 2009, a Turkish Airlines Boeing 737-800 crashed on final approach into Schiphol airport, Amsterdam. Passing 2000 ft with the autopilot and autothrottles engaged, One of the two radio altimeters, which was feeding height data to the auto throttle system, suddenly and visibly malfunctioned and, as a direct result, thrust on both engines was reduced to flight idle. The aircraft lost speed and height and the crew were slow to react and only applied thrust when the stick shaker activated at just below 500 ft, which was too late to recover the situation.