On 10 December 2016, a Boeing 737-400 main gear leg collapsed on landing after an approach at excessive speed was followed by a prolonged float prior to touchdown on the high-altitude Kabul runway. The Investigation found that the collapse had followed a severe but very brief wheel shimmy episode in the presence of a number of factors conducive to this risk which the aircraft operators pilots had not been trained to avoid. It was also found that although the aircraft operator regularly undertook wet lease contract flying, their pilot training policy did not include any route or aerodrome competency training.