The investigation report gave considerable attention to the possibility that the air crew could have misread their "three-pointer" altimeters, which were designed to warn the pilots with a cross hatch indicator when the altitude was below 10,000 feet.
O informe da investigación centrouse moito na posibilidade de que a tripulación puidese malinterpretar os seus altímetros de "tres punteiros", que estaban deseñados para advertir aos pilotos cun indicador de trama cruzada cando a altitude estaba por debaixo dos 10 000 pés.