The South Korean government will review safety systems associated with emergency landings at airports across the country following the fatal Jeju Air crash, which killed 179 people. The plan includes removing the concrete embankment at Muan International Airport.

South Korea will extend runway safety areas and redesign infrastructure after the crash of a Jeju Air Co. flight last month that killed almost everyone on board, sparking criticism that the design of the airport might have exacerbated the accident.

South Korea’s authorities investigating last month’s Jeju Air plane crash have submitted a preliminary accident report to the UN aviation agency and to the authorities of the United States, France and Thailand,