What a tiny triangle above your plane seat means?

An especially astute passenger will notice that these little triangles throughout the cabin line up with the wings outside the plane. If flight crew need to check the wings, these triangles let them know the best vantage points for the slats and flaps outside.



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Sci-fi series aside, these black and red, triangle-shaped stickers are actually important reference points for the flight crew — as they're located where the airplane's wings are visible — allowing flight attendants to easily view the flaps and slats on the wings for potential icing problems or issues that may need to ...

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If the crew believe there is an issue with a wing – the flaps, the slats or even engines – looking out of the window is the best way to verify visually their concerns, one way or another. And to do that they will head to the best seat in the house, usually marked by a small black triangle on the interior cabin wall.

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When flight attendants or pilots need to look at the wings, the triangle stickers act like a sign telling them exactly where to look.

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These tiny holes, also called breather holes, serve as a safety function, by making sure that the outer pane bears all the air pressure (the pressure inside the cabin is much higher than outside). This also ensures that in case the pressure difference becomes high enough, it is the outer pane that breaks off first.

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If there is a problem on-board and the crew is unsure about the condition of the aircraft, the triangle indicates what window should be used to inspect flaps, slats or engines or look out for icing. This saves important time in case of an emergency, as the crew doesn't has to search the right window to look out.

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If there is a problem on-board and the crew is unsure about the condition of the aircraft, the triangle indicates what window should be used to inspect flaps, slats or engines or look out for icing. This saves important time in case of an emergency, as the crew doesn't has to search the right window to look out.

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In most transport category aircraft, there are two anti-collision lights. One is called the beacon and the other is called the strobe. A beacon is a red flashing light. In many aircraft, there are two beacon lights - one on top of the fuselage and the other on the belly of the aircraft.

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Occasionally, aircraft with a seating structure of 2+2 may letter the seats as ACDF to keep with the standard of A/F being window and C/D being aisle on short-haul aircraft (which generally have 3+3 seats).

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The pointed nose allows for a weaker shock so that it doesn't cause an excessive amount of resistance. Airplanes generally have either a rounded nose or pointed nose. As revealed in this blog post, airplanes are given a rounded nose if they fly slower than the speed of sound.

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Severe turbulence can cause a plane to drop so suddenly that pilots temporarily lose control. But, again, that's not enough to crash the plane. That's not to say it's never happened. In 1966, human error and turbulence combined to bring a plane down over Mount Fuji.

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