Malfunctions release jet engine ‘bleed air’ into cabins causing foul smells aboard some flights in the US
“The smell of jet fuel is fairly common in the passenger cabin when your plane is preparing to taxi.
Far less so is the aroma of dirty socks, rancid cheese, or a wet dog – the typical unpleasant notice that engine oil vapours have also seeped in.
These smells are usually found in jet engine “bleed air”, which is outside air that has been shunted from the engines into an air-conditioning system and then to the cabin. In various systems – cabin pressurisation, water-tank storage pressure, even heating to dissipate wing ice – this air is highly useful to the plane’s operation.
Yet when engine seals deteriorate, the bleed air can mix with fumes from high-temperature synthetic engine oil. At high-enough concentrations, flight crews and passengers can grow ill, forcing pilots to divert to the closest airport.” (© source) read full article here
source © THE NATIONLAL UAE Edition
image credits © Mark Kauzlarich/Bloomberg “A JetBlue Airways plane at John F Kennedy International Airport. The carrier suffered a ‘fume incident’ this month”
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