Air crash investigators at the Paris-based BEA have been working on the theory that the speed sensors, known as pitot tubes or probes, malfunctioned because of ice at high altitude.

总部设在巴黎的BEA空难事故调查局做出推测：飞行传感器，也就是空速管和探针由于高海拔结冰而出现故障失灵。