Season 1 · Episode 4

21st Century Jet: The Building of the 777: Taking Flight

A year of flight tests ensure the 777 is capable of surviving more extreme conditions than it is ever likely to meet. The tests begin slowly, with minor problems such as panels falling off and undercarriage doors vibrating, and culminate in "The Big One" -- showing the plane at its heaviest weight can use maximum braking without the resulting 3,000 degree heat setting it afire.