Part 3/10:
As the flight progressed towards Anchorage, trouble lurked beneath the Earth's surface. The Mount Redoubt volcano in Southern Alaska had erupted a day prior, spewing significant amounts of ash into the atmosphere—a problem the crew had been briefed about prior to their departure. They understood the risks involved, recalling the 1982 incident in which another Boeing 747 had lost all engine power after entering a volcanic ash cloud.