[More See 41st I] The last crash, why did that passenger plane crash? On the 29th of last month at 9 AM, Muan International Airport in Jeollanam-do. Lee Geun-young, who runs a restaurant near the airport, suddenly heard an unusual sound. Interview Lee Geun-young / Witness, filming the accident video I was preparing for business in the kitchen when I heard a loud bang outside. I think it happened three or four times. When I went outside and looked, I saw the plane coming down. The plane, which was supposed to stop on the runway, exploded right before Lee’s eyes. Interview Lee Geun-young / Witness, filming the accident video When I heard the ‘bang’, I don’t think I had any thoughts. I think I thought, “Is this a movie?” The airport suddenly became a place of loss and sadness. Jeju Air disaster victim family (voice altered) I sent photos to the family group chatroom of my classmates and I smiling brightly, so I had a good time in Thailand… Jeju Air disaster victim family (voice altered) I thought we would grow old together as friends for life. But I never dreamed that I would go first like this. I said, “Let’s live beautifully and wonderfully until we’re 100 years old and become grandmothers.” But then he left. This accident had a lot of casualties. 179 victims who died without being able to do anything. Where and what went wrong? On the morning of the 29th of last month. Jeju Air Flight 7C2216, carrying 181 passengers and crew, attempted to land at Muan International Airport. ▶ 08:54 First landing permission The accident passenger plane requested landing permission at Muan Airport at 8:54 a.m. ▶ 08:57 Bird strike warning However, 3 minutes later, a warning to be careful of bird strikes was issued from the control tower. The passenger plane postponed landing and attempted to increase its altitude. It attempted a “go around” to fly up again and come back to land. ▶ 08:59 “Mayday” declaration followed by “Mayday” declaration. An airplane that failed to reach its target altitude lowers its altitude by turning its nose in the opposite direction of its initial landing direction. ▶ 09:02 Runway touchdown For some reason, it attempted a body landing without its landing gear. ▶ 09:03 Impede collision A strong collision that followed without reducing its speed. It took only 9 minutes from the first landing attempt to the collision. What happened in between? 【Question 1】Bird collision - Engine failure? Muan Airport, adjacent to a winter migratory bird habitat. The accident started with a collision with a flock of birds. Three minutes after the first landing permission, the control tower issued a warning to "beware of bird collision," and two minutes later, the pilot announced the bird collision and called mayday. Kang Jeong-hyeon / Director of Aviation Operations, Ministry of Land, Infrastructure and Transport (Last month, 30th) Mayday (emergency), mayday, mayday, and declared it three times. The terms bird strike (bird collision), bird strike, and going-around were used. If a flock of birds were sucked into the engine, it is highly likely that the engine was seriously damaged. Interview Accident Witness There were several bang bang bang bang explosion sounds. (Before landing?) Yes. I heard that sound in the air. Interview Kwon Bo-heon/Professor of Aviation Safety Management at Far East University/Former Korean Air Captain When birds are sucked into the engine, there are small fins called blades in the front of the engine. If one fin in the front breaks, it hits the fin in the back, and if the fin in the back breaks, it hits the fins in a chain reaction. As these fins go out, they explode the combustion chamber in the back. Then, the combustion chamber explodes, causing this bang noise. However, judging from the bang, it seems that at least several birds collided with the right engine… [Question 2] Engine failure - Landing gear malfunction? A passenger plane that decided to go around due to engine problems. It attempted to land on the opposite runway, but the landing gear did not come down. Did the engine damage lead to the landing gear failure? At the beginning of the accident, the Ministry of Land, Infrastructure and Transport said that the engine failure was unrelated to the landing gear problem. However, two days later, they changed their position and said that if all engines fail, it could lead to a landing gear problem. Interview Yoo Kyung-soo / Director of Aviation Safety Policy, Ministry of Land, Infrastructure and Transport (31st of last month) If an engine fails, there is a hydraulic system problem, which can cause problems with the landing gear operation. In that case, if everything fails, there is a lever that can be used manually. Another video taken just before the accident. Flames are captured coming out of not only the right engine but also the opposite engine. The pilot's mayday declaration is also a part that suggests damage to both engines. Kwon Bo-heon / Professor, Department of Aviatio