South Korean officials sent the voice recorder to be analyzed at an NTSB lab in the US after they discovered data was missing.

The flight data and cockpit voice recorders on the Jeju Air jet that crashed on Dec. 29 stopped recording about four minutes before the airliner hit a concrete structure at South Korea's Muan airport,

The damaged flight data recorder had been deemed unrecoverable for data extraction by South Korean authorities, who sent it to the United States for analysis at the US National Transportation Safety B

Key data is missing from the black boxes of the Boeing Co. 737-800 that crashed on the runway of a South Korean airport last month.

The black boxes from the Jeju Air Co. passenger plane that crashed last month have been found to lack crucial data from the final four minutes before the explosion, Yonhap News Agency reported, citing South Korean investigators.

South Korea’s leading low-cost carrier, heavy with debt and its stock already near record lows, is now facing intense public and government scrutiny.

SEOUL (Reuters) -- The flight data and cockpit voice recorders on the Jeju Air jet that crashed on Dec. 29 stopped recording about four minutes before the airliner hit a concrete structure at South Korea's Muan airport, the transport ministry said on Saturday.

Before it suffered the deadliest crash in South Korea's history, budget airline Jeju Air was moving fast: racking up record passenger numbers and flying its aircraft more than domestic rivals and many of its global peers,

The aftermath of the Jeju Air crash at Muan International Airport in Muan County, South Jeolla Province, has dealt a severe blow to Vietnamese tourist destinations popular with South Koreans, leading to a significant drop in travelers.