- The Sukhoi Superjet 100 was on a multination demonstration tour
- The plane started to descend and then vanished off radar screens
- Wreckage of the plane has been located, a government official says
- The Indonesian transport safety agency says 47 people were on board
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Jakarta, Indonesia (CNN) -- The wreckage of a Russian passenger airliner that went missing during a demonstration flight over Indonesia has been located in a mountainous area, a local official said Thursday.
Teams searching for the plane spotted debris from the Sukhoi Superjet 100 at a height of about 5,800 feet (1,800 meters) on the side of Mount Salak, a volcano south of Jakarta, said Daryatmo, head of the National Search and Rescue Agency.
Daryatmo, who like many Indonesians only uses one name, said the Sukhoi logo had been identified amid the wreckage.
No information was immediately available about the passengers who were on board the plane, which disappeared off radar screens on Wednesday.
Rescue workers on the ground have not yet been able to reach the wreckage, but the Search and Rescue Agency is dispatching a helicopter to the site, Daryatmo said.
There were conflicting reports about the number of people on the Sukhoi jet, Russia's newest civilian airliner, when it went down, with different agencies giving headcounts between 37 and 47.
The confusion appeared to stem from uncertainty about whether everybody on the passenger list actually boarded the plane.
The latest number of people on board, provided by the Indonesian Transportation Safety Committee, was 47, all of whom were Indonesian except eight Russian crew members and two other foreign nationals.
The plane was on its second demonstration flight Wednesday when it lost contact with air controllers at Jakarta's Halim Perdanakusuma Airport.
"The first demonstration flight in the morning went smoothly," said Sunaryo. "There were no problems."
On the second flight, the plane began making its descent but vanished from radar screens at 6,200 feet in a mountainous area.
The plane lost contact with air traffic controllers at 2:12 p.m., 21 minutes after taking off, said Marsda Daryatmo, head of the search and rescue agency. Two helicopters were immediately sent out to search for the plane but had to return to their bases due to strong winds and unpredictable weather.
The Sukhoi jet arrived in Jakarta as part of a demonstration tour of six Asian countries. It had been to Myanmar, Pakistan and Kazakhstan, and was due to visit Laos and Vietnam after Indonesia, said the Russian news agency RIA Novosti.
Sukhoi manufactures military aircraft and is known especially for its fighter jets. Its civilian aircraft is narrow-bodied with a dual-class cabin that can transport 100 passengers over regional routes. It flew its maiden flight in 2008.
In March, a Superjet 100 operated by Russia's Aeroflot Airlines was forced to abandon its flight to Astrakhan, Russia, and return to Moscow because of problems with the undercarriage, according to RIA Novosti.
A similar defect in another Aeroflot-operated Superjet 100 plane had to be fixed in Minsk in December.
Russia's state-run United Aircraft Corp. said the defect did not affect passenger safety.
