South Korea will remove a concrete structure at the runway of one of its southern airports, the scene of a plane crash that killed all but two of the 181 people on board last month

Son Chang-wan was in office while works were undertaken at Muan International Airport. Last month, a plane crashed into a concrete barrier there, killing 179 people.

South Korea will release by Monday a preliminary report on the Dec. 29 Jeju Air plane crash that killed 179 people, the deadliest air disaster on

South Korea has extended the closure of the airport where a Jeju Air plane crashed last month until 19 January. A Boeing 737-800 ran off the runway and burst into flames after ramming an embankment at the Muan airport, killing all but two of the 181 people on board.

Following the deadly Jeju Air accident, the government ordered low cost carriers to reduce flight times, boost pilot training and expand maintenance crews.

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.

The deadliest plane crash in South Korea's history is triggering a change at the country's airports. The BBC reports the concrete barriers that contain navigation systems at seven airports will be altered in the wake of the crash,