the argentinean civil aviation accident investigation board (jiaac) established that the "immediate cause" of the accident was the pilot gustavo weigel's failure to extend the flaps to increase the aircraft's lift. in addition, the alarm that alerted about the wrong position of the flaps were ignored for 52 seconds. the pilots continued to taxi, and let the aircraft exceed v1 speed or decision speed, which once reached made it impossible to stop the takeoff.