(CNN) - Russia's newest civilian airliner disappeared Wednesday from radar screens during a demonstration flight in the Indonesian capital, Jakarta. There were 44 passengers on board.
The pilots requested permission to descend from 10,000 feet to 6,000 feet, according to air traffic controllers. After that, all radio contact was lost. The plane began making its descent but vanished from radar screens in a mountainous area.
By the time the plane was due to return it should have burned up its fuel. The "Sukhoi Superjet 100” has a dual-class cabin that can transport 100 passengers over regional routes.