The partially dismantled Spirit plane N950NK at Goodyear Airport. Its engines are worth more than the full jet.Rebecca Noble/Getty ImagesA video of a four-year-old Spirit jet being dismantled in the desert went viral over the weekend.The Airbus plane's Pratt & Whitney GTF engines are as valuable as a full aircraft right now.A manufacturing defect on the GTF engines has created a desperate need for spare parts.A nearly new Spirit Airlines jet was…