TAME Ecuador flight 120, a Boeing 727, impacted a mountainside while on approach to Tulc n Airport, Colombia, killing all 94 occupants. TAME Flight 120 was a scheduled flight from Quito to Cali, Colombia via Tulc n. The Boeing 727 took off from runway 17 at 10:03 for the first leg to Tulc n. The flight climbed to the cruising altitude of FL180 and proceeded on the G-675 airway towards Ipiales from where it was to turn to Tulc n. At 10:15 the flight contacted Tulc n Tower. At that moment the airplane was 29 miles from the Tulc n NDB. The crew received permission to descend to FL140 and was given the current weather information, which included 8000 metres visibility, few clouds at 200 metres and overcast at 500 metres. The approach procedure called for a speed of 180 kts, but the actual speed was much higher at 230 knots. During the descent the airplane flew into the side of the Nevado el Cumbal Volcano at 14,700 feet, 1400 feet below the summit. PROBABLE CAUSE (translated from Spanish): 1) The decision of the instructor captain and his crew to initiate and continue the operation towards Tulcan airport below the meteorological minima established in the company’s SOPs. 2) Inadequate navigation and operation of the aircraft by the pilot flying and directed by the instructor captain, consisting of entering the holding pattern of the Tulcan radio beacon with a speed of 230 knots indicated airspeed and with a banking of 15 degrees exceeding the maximum stipulated speed limit of 180 knots during the entire procedure including the holding pattern and using a banking below the recommended range of 25 to 30 degrees, thus exceeding the lateral navigation and obstacle protection limits of the holding pattern, leading this operation to the collision with El Cumbal Hill.