Aviation experts have raised questions about an "unusual" concrete wall near the runway and its role in the downing of the South Korean plane that killed 179 people.
According to foreign media, footage shows the Jeju Air plane skidding off the runway before hitting the wall and bursting into flames at Muan International Airport.
Authorities investigating the cause of the South Korean plane crash are considering the significance of the location of the concrete wall about 250 meters (820 feet) from the end of the runway.
Air safety expert David Learmount said that if the "obstacle" had not been there, the plane "would have come to a normal stop and probably everyone on board would still be alive."
The pilot reported that the aircraft had struck a bird and then aborted the initial landing and requested permission to land from the opposite direction.
The plane descended a distance along the runway 2800 meters and appeared to land without using its wheels or any other landing gear.
"The reason so many people died was not the landing itself, but the fact that the plane hit a very solid obstacle just beyond the end of the runway," Mr Learmount said.
Christian Beckert, a Lufthansa pilot based in Munich, called the concrete structure "unusual", telling the Reuters news agency: "Normally, at an airport with a runway at the end, you don't have a wall."
The concrete structure holds a navigation system that helps planes land - known as a localizer - according to South Korea's Yonhap News Agency.
At 4 meters high, it is covered in dirt and raised to keep the localizer level with the runway, to ensure proper operation, Yonhap reported.
South Korea's Ministry of Transport has said that other airports in the country and some overseas have installed equipment with concrete structures.
However, officials will consider whether it should have been made of lighter materials that would break more easily upon impact.
Chris Kingswood, a 48-year-old pilot who has flown the same type of aircraft involved in the crash, told BBC News: "Obstacles within a certain radius and distance of the runway are required to be frangible, meaning that if an aircraft hits them, they break."