Sukhoi has conducted the first flight of a longer-range Superjet 100, starting a test programme which will last around three or four months.
The twin-engined aircraft, designated the SSJ100LR, will have a range of nearly 2,470nm (4,580km), some 50% greater than the basic variant,
Sukhoi says the first airframe, 95032, performed its maiden flight on 12 February. It expects to secure certification for the twinjet in 2014.
It adds that the SSJ100LR will require a runway length of 2,052m (6,730ft). The airframer has not confirmed which operator will be the first to receive the new type.
Sukhoi performed the first flight of the basic aircraft nearly five years ago, in May 2008.