Searchers find 1st black box from crashed Russian plane

Russia has found the first flight recorder from a military plane that crashed into the Black Sea, killing all 92 on board, the Defence Ministry says amid unconfirmed reports that authorities had grounded all aircraft of the same type.

More pieces of the wreckage from Sunday's crash were found overnight

Search crews in Russia have located one of the black box flight recorders from the plane that crashed Sunday, killing all 92 people on board. Crews have also found more pieces of the doomed aircraft. (Vladimir Velengurin/Emergency Situations Ministry Photo/Associated Press)

Russia has found the main flight recorder from a military plane that crashed into the Black Sea, killing all 92 on board, the Defence Ministry said Tuesday amid unconfirmed reports that authorities had grounded all aircraft of the same type.

The recorder, one of several reported to be on board, contains information that could help investigators identify the cause of Sunday's crash, which killed dozens of Red Army Choir singers and dancers en route to Syria to entertain Russian troops in the run-up to the new year.

Investigators have so far said that pilot error or a technical fault, rather than terrorism, are most likely to have caused the Defence Ministry Tupolev-154 to crash into the sea.

The first black box, which was located by a remote-controlled underwater vehicle at a depth of around 17 metres, and 1,600 metres from the resort town of Sochi, will be sent to a Defence Ministry facility in Moscow for analysis.

"The casing holding the flight recorder is in a satisfactory condition," the ministry said in a statement.

"After it is technically cleaned in distilled water, we will start transcribing it."

The ministry said numerous fragments of the plane had been found, including the engine, the landing gear and pieces of the fuselage.

The Interfax news agency cited an unnamed source as saying Russia had grounded all TU-154 planes until the cause of Sunday's crash became clear, but that has not been confirmed officially. 

There are reports that officials have grounded all TU-154 planes until the cause of the crash becomes clear. (Maxim Shemetov/Reuters)

The Defence Ministry says the downed jet, a Soviet-era plane built in 1983, had last been serviced in September and underwent more major repairs in December 2014. 

Russian pilots say the TU-154 has a decent safety record, though major Russian commercial airlines have long since replaced it with Western-built planes.

The last big TU-154 crash was in 2010 when a Polish jet carrying then-president Lech Kaczynski and much of Poland's political elite went down in western Russia killing everyone on board.

Interfax, citing a law enforcement source, said a second flight recorder had also been found in the wreckage of Sunday's crash, but not yet raised to the surface.

The Defence Ministry said that search-and-rescue teams have so far recovered 12 bodies and 156 body parts.