What is the white stuff that comes out of planes called?

These clouds are contrails, short for condensation trails. Water vapor is one of the byproducts of jet fuel combustion and will turn into ice crystals in the cold air at the high elevations where jet airplanes fly. Those ice crystals create a cloud (the contrail), which does not pose any public health risk.



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Jet Fuel. The distinct smell inside commercial airplanes is often attributed to jet fuel. During flight, commercial airplanes burn a mixture of jet fuel and oxygen in their engines to produce propulsion. When jet fuel burns, it creates odorous vapors that may enter the cabin.

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Some aircraft damage from lightning strikes includes broken lighting and windows, deformed antenna placements, and onboard electronics malfunctions. Other abnormalities or warnings on the flight deck, such as cabin air pressurization problems or false alarms, can occur after your airplane has been struck by lightning.

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While fuel dumps don't happen every day, they're also not uncommon. Nor do they usually represent a major emergency. In fact if an aircraft is taking the time to dump fuel before landing, that's likely an indication that the issue forcing the plane to land is serious but not critical.

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Thus, these contrails indicate regions where there is strong wake turbulence caused by the aircraft in front of you that made the clouds. Heavier, slower aircraft make more intense wake turbulence.

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American Airlines, one of the major carriers in the USA states, 'The airline reserves the right to refuse transport of a passenger, or have them removed from their flight at any point if they have an offensive odour not caused by a disability or illness'.

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