The flight recorders of a Russian Boeing 737, which skidded off the runway in Sochi upon landing, crashed into a riverbed and caught fire are in “acceptable” condition, a source told TASS late on Saturday. The recorders have been already sent to Moscow for deciphering. A probe into the incident has been launched by civil aviation watchdog, Interstate Aviation Committee (IAC). Some 18 people were injured during the crash, while the aircraft caught fire and was partially destroyed. The only fatality of the incident was an airport employee, who had a heart attack during rescue operation.