electricity jumping from one of these wires would release an enormous amount of energy and could ignite a fire. investigat investigators do, in fact, find evidence of arcing on the left and right lavatory feeder wires, that come out through holes in the floorboards. the arc starts a fire that ignites the lavatory walls, consuming vital electric systems, making it almost impossle for captain cameron to control the aircraft. >> became suddenly very hard to fly. it was nose heavy because the stabilizer trim had failed. >> his arms would have been very, very,ç very tired by the time he got on the ground. he had expended a lot of physical energy just to keep control of the airplane. he did a really good job. he's a seriously good aviator. >> air canada says the plane met all safety standards. the question now is whether those standards should be made tougher.