听力原文： All the rescuers found in the mountains of the Sierra de Perija in Venezuela was the scattered wreckage of the plane and the charred corpses of its occupants. There were no survivors. The plane not only lost both of its engines— a fact revealed from its last radio messages—but the aircraft exploded on impact, producing a fireball that was seen kilometers away. The aircraft's black box has been found and will be analyzed by experts from Venezuela, who have sent their own investigators to look into the tragedy. West Caribbean Airways is now under the microscope. The company lost another aircraft in March this year in a crash that killed eight people. The airline is in severe financial difficulties and even before this disaster had been told to tighten up its maintenance program by the Colombian Aviation Authority. The company's promised to suspend flights until preliminary investigations are completed. Which one of the following is NOT true according to the accident?