...but our engines provides the compressed air that is fed into the passenger compartment on commercial aircraft. It also provides the compressed air to run the Pneumatic Air Conditioner system.The paying passengers get upset when the airplanes cabin fills with smoke while they are flying at 40,000 feet half way between New York and London.
No wonder! A couple of times I've smelt burnt fuel (or something else/oil) in the cabin out of nowhere whilst watching one of those in-flight movies. Kind of scary but then I was like it's cool. Sorry about going off-topic, but I learnt a new thing today.