Airbus lost $6.1 billion on the A380 after engineers used two different versions of the same software to design the aircraft wiring — triggering massive delays and cost overruns

The Airbus A380 is the world's largest passenger plane, and it needs a lot of electricity to work. It contains about 530 kilometers (330 miles) of wiring and 100,000 individual wires. During the design phase, engineers used a program called CATIA to map out where every wire should go.The problem was that the team in Germany used Version 4 of the software, while the team in France used the newer Version 5. The two versions calculated the 'bend radius' differently. This is the measurement of how much a wire can curve without breaking. Because the versions didn't match, the 3D models were slightly off.When the giant pieces of the plane were brought together in 2005, the wires didn't reach their plugs. They were only about one centimeter too short, but in a plane, everything must be perfect. You cannot just stretch a wire or tape it together. This tiny gap caused a massive disaster.Airbus had to hire 2,000 extra workers to rip out the old wires and install new ones by hand. This mistake delayed the plane for two years and cost the company billions of dollars.