The black boxes, which contained cockpit voice recordings and flight data from the Jeju Air plane, do not contain footage from the last four minutes of the plane before it crashed.
South Korea’s transport ministry said on Saturday that the black box recorders stopped transmitting data four minutes before the catastrophic crash that killed 179 people.
The Boeing 737-800 was flying from Thailand to Muan, South Korea, on December 29 with 181 passengers and crew on board.
The pilot notified air traffic control that the jet had suffered a bird strike that resulted in a faulty gear, and an emergency was declared four minutes before it landed on its belly at Muan Airport and burst into flames after hitting a concrete barrier.
“Analysis revealed that CVR and FDR data were not recorded during the four minutes before the aircraft’s collision with the localizer,” the transport ministry said in a statement, commenting on the fate of the two recording devices, Reuters reports.