pilots are faced with a difficult decision. >> the pilot advised that they needed to dump fuel. at that point they were approximately 16,000 feet. the fuel dump complicated the situation greatly. >> it's a good decision to get the airplane as light as you can. it's easier on the airplane. >> but delaying the landing could put the flight in even more danger. the passengers have been told they are being diverted, but there is no smoke in the cabin, and they have no idea that inside the cockpit, something is going horribly wrong. following the smoke checklist, the pilot shut off power to the cabin. if there is an electrical fire, this could cut power to the source. but the smoke only gets thicker. then the autopilot fails. flying the plane by hand in the dark, the pilots put on their oxygen masks. >> by this point, they knew they had a very serious situation and they needed on the ground as rapidly as possible. >> as soon as they were over the