Authorities have said black boxes holding the flight data and cockpit voice recorders stopped recording around four minutes before the crash.

The nation’s transport ministry reviewed structures near airport runways after the deadly crash of a Jeju Air flight late last month.

The two flight recorders on board a South Korean airliner stopped working before the jet crashed during an emergency landing and subsequent crash that killed 179 of the 181 people on board, officials said Saturday.

After a deadly plane crash in South Korea, authorities are conducting a full investigation on 101 of the same model of aircraft that are operating in six local airlines.

A Jeju Air jet in South Korea crashed last month due to bird strikes, leading to 179 fatalities. Investigators found bird feathers and blood in its engines. The crash occurred after overshooting the runway,

The two black boxes on the Boeing jet involved in the worst aviation disaster on South Korean soil stopped recording about four minutes before the accident, the transport ministry said on Saturday. South Korean investigators previously said the flight data and cockpit voice recorders were key to finding out the cause of last month's crash that killed 179 people.

South Korean investigators said Friday they expected to find more human remains as they began lifting the wreckage of the Jeju Air jet that crashed on landing last weekend killing all but two of the 181 passengers and crew aboard.

A total of 179 died in the crash, with just two crew members surviving in one of the nation’s worst aviation disasters.