After analyzing the devices, the U.S. National Transportation Safety Board concluded​ that both the flight data and cockpit voice recorders stopped working about four minutes before the crash.

Flight recorders from the passenger jet that crashed in South Korea last month, killing more than 170 people, stopped working minutes before the plane belly-landed and exploded on the runway, investigators said Saturday.

The voice and data recorders pulled from the wreckage of the Jeju Air Co. jet in South Korea failed to capture the final moments before the Boeing Co. 737-800 made an emergency landing and crashed, depriving investigators of evidence to help understand the cause of the country’s deadliest aviation accident.

South Korea's transport ministry said on Saturday that the black box on the Jeju plane that crashed landed failed to record the last four minutes of the flight.View on euronews

A former transport ministry accident investigator said the discovery suggests all power, including backup, may have been cut, which is rare.

THE Jeju Air jet crash in South Korea and the failure of its black box may have been caused by a series of catastrophes sparked by a bird strike, an expert has said. The crash at Muan

Jeju Air flight 7C2216’s flight recorders have been recovered after crash that killed 179 people, but authorities say data relating to crucial 4 minutes prior to crash are missing

The damaged flight data recorder from the Jeju Air passenger jet that crash-landed in South Korea will be sent to the United States for analysis, Seoul’s transport ministry said Wednesday, as bereaved families began visiting the crash site.

South Korea's transport ministry revealed on Saturday the black box on the aircraft, which was carrying 179 people, stopped recording just moments before the airliner hit a concrete structure at Maun

Officials say the black boxes of a Boeing jetliner that crashed in South Korea last month stopped recording about four minutes before the accident