An airliner is a large
fixed-wing aircraft with the primary function of transporting paying passengers. Such aircraft are usually operated by an
airline which owns or
leases the aircraft.The official definition of an airliner varies from country to country, but the common definition is an
aircraft with seating for 20 or more passengers and/or an empty weight above 22,680 kg (50,000 lb.), with two or more engines.
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