Resume of 747-400 overhaul and interesting info.

Last Monday we watched a video showing a magnificent overhaul of a Boeing 747-400. Now I'm going to show you some info that makes of this overhaul an amazing milestone.

First of all, that job it's done by a team of 200 incredible people. That team must doit every 6 years. The milestone is a sum of 30000 hours of pure and stressful hard work, a work in a machine of 200 million. They check 20000 different parts in a set of 12000 jobs. In those jobs, they checked also 6 million components.

Every 747-400 it's made with the enormous figure of 172000 miles of wire, yes 172000 miles. That airplane has a weight of 180 tons that stands on three landing gears and each one of them cost 300000$ and hold in total 18 wheels. To do the overhaul they must stand all the tons 20 feet above the ground. This model has 12 scape chutes that inflate in only 3 seconds, amazing cause they make 30 meters. To replace one of them the team needs over 6 hours. Another hard task is to remove the panels. For example, only the "down panels" are 300 and the "side panels" 140. All the 747 hold 4 enormous engines that each one cost 8 millions and give a total horsepower of 120000hp. That horsepower gives a total thrust of 60 thousand pounds. In air, at the cruising time the airplane will fly at 910 km/h it's very very fast. To feed the engines the 747 accounts with fuel tanks. The biggest one can contain 65 thousand liters in 6 compartments, imagine the rest. Autonomy is such high, this condition permit to this model fly over 14 hours and if the airplane has 300 passengers it will need one tone of food and drink and also will load over 50000 products to the costumers. Another interesting part is the two black boxes. It's funny because they originally are orange and red. One of them copies all the data information and the other one copy all the radio voices. They are so well built that can resist 1000 degrees for half hour.

The dimensions are spectacular, the wingspan its the same as a football pitch.

One of my favorite curiosities it's that every airplane also the 747 it's stricken by a lightning one time per year, for me, it's a lot. Also, it's more common the strikes of birds and hail and is very dangerous, they can shoot down them. Inside the airplane, the crew has its own relaxing place but they only use it 3 hours per trip.

A part of the overhaul every airplane will have to pass a little check every year, as you can see it´s very safe.

Finally, I want to tell you some prices that will do a little pain hahaha.

A second-hand engine costs 1.2 million, only a second-hand airplane coffee machine will cost you 3000$. An old toilet boul 500$ and for examole a windshield 30000$.

And that's all for today I hope you liked this post and see you next week.