You Probably See These Things Every Day But Have No Idea Of Their Purpose

Bleed Hole Is Not For Blood At All

Passengers have different preferences: some like to sit in the aisle to have easier access to the restroom and to get out of the plane faster than others, while others prefer the window seat because of the view.

Those who belong to the latter category may have noticed a tiny hole in the glass. It does look alarming to see a hole in the window, but this valve makes it possible for the air outside and inside the cabin to equilibrate.

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