Jakarta, May 10 (AP) An air force official says the wreckage of a Russian-made passenger jet that disappeared during a demonstration flight in Indonesia appears to have been spotted on the side of a volcano. Maj. Ali Umri Lubis, of Atang Sanjaya Air base in Bogor, told MetroTV today that helicopters spotted what they believe is the plane on the side of a cliff on Mount Salak in West Java province. He said it was at an elevation of about 1,500 meters but had no further details. The Sukhoi Superjet-100 was carrying 48 people - including potential buyers and journalists - when it dropped off the radar just 21 minutes after takeoff yesterday. (AP)