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

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

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.

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,

Search operations at the site of the Jeju Air plane crash concluded on Saturday, one week after the devastating accident claimed 179 lives. Officials announced that all 179 bodies have been recovered, with 151 already returned to their families along with identified personal belongings.

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.

South Korea said it planned to improve the structures housing the antennas that guide landings at its airports this year after December's fatal crash of a Jeju Air plane, which skidded off the runway and burst into flames after hitting such a structure.

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