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aircraft design - Why is there a hole in one of the layer of an airplane's windows? - Aviation Stack Exchange
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Classic image through aircraft window onto jet engine. Frost on the glass window. Focus on the wing of the aircraft Stock Photo - Alamy
![aircraft design - Why is there a hole in one of the layer of an airplane's windows? - Aviation Stack Exchange aircraft design - Why is there a hole in one of the layer of an airplane's windows? - Aviation Stack Exchange](https://i.stack.imgur.com/XByjt.jpg)
aircraft design - Why is there a hole in one of the layer of an airplane's windows? - Aviation Stack Exchange
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Jet Window Plane Glass Frame Airplane Porthole Stock Illustration - Download Image Now - Aerospace Industry, Air Vehicle, Airplane - iStock
![So THAT'S why plane windows contain holes: Expert reveals the 'air conduit' acts as a failsafe to protect the craft if the outer pane cracks | Daily Mail Online So THAT'S why plane windows contain holes: Expert reveals the 'air conduit' acts as a failsafe to protect the craft if the outer pane cracks | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2015/05/12/13/2896018500000578-3078042-image-a-12_1431432671880.jpg)
So THAT'S why plane windows contain holes: Expert reveals the 'air conduit' acts as a failsafe to protect the craft if the outer pane cracks | Daily Mail Online
![a small tempered glass window on board an aircraft. passengers look at the ground from their seat. the tail of the plane is visible in the window 15044289 Stock Photo at Vecteezy a small tempered glass window on board an aircraft. passengers look at the ground from their seat. the tail of the plane is visible in the window 15044289 Stock Photo at Vecteezy](https://static.vecteezy.com/system/resources/previews/015/044/289/large_2x/a-small-tempered-glass-window-on-board-an-aircraft-passengers-look-at-the-ground-from-their-seat-the-tail-of-the-plane-is-visible-in-the-window-free-photo.jpg)