JAKARTA, Indonesia - Villagers have found the flight data recorder from a Russian passenger jet that slammed into an Indonesian volcano three weeks ago and killed 45 people, officials said Thursday. The data it contains could help explain what caused the crash.

Another part of the Sukhoi Superjet 100’s “black box,’’ the cockpit voice recorder, was found about a week after the May 9 accident during a demonstration flight for potential buyers.

However, the flight data recorder - which logged data such as the jet’s altitude, speed, and route - was buried in a landslide after the plane smashed into the side of Mount Salak, said Daryatmo, chief of Indonesia’s search and rescue agency.

He said the recorder was in good condition when nine villagers found it Wednesday in a deep ravine.

They found the device after rains washed away some of the earth, said the search mission chief, Colonel A.M. Putranto.

Digging with farm tools, villagers also found remains of victims and other parts of the plane, including its tail, a control lever, and a compressor, Putranto said.