The Tupolev Tu-154 (Russian: Туполев Ту-154) (NATO reporting name “Careless”) is a Soviet medium-range trijet airliner similar to the Boeing 727. It was the mainstay of Soviet airlines for several decades and carried about half, or approximately 137 million, of the passengers flown by Aeroflot and its subsidiaries during that time. The aircraft has been exported to and operated by at least 17 foreign airlines. It remains the standard airliner for domestic routes in Russia and other states of the former Soviet Union, and to a lesser extent in eastern Europe. The Tu-154 is designed to handle unpaved and gravel airfields, and often operates in extreme Arctic conditions.