An audit by South Korea’s Board of Audit and Inspection (BAI) has found that cost-cutting during the construction of a concrete runway barrier at Muan International Airport directly contributed to the severity of the Muan airport disaster on December 29, 2024. The crash of Jeju Air Flight 2216 killed 179 of the 181 people on board, making it the deadliest aviation accident on South Korean soil.
What Happened
Jeju Air Flight 2216, a Boeing 737-800 arriving from Bangkok, suffered a bird strikeA collision between an aircraft and one or more birds, which can damage engines, windscreens, or other critical systems and cause emergency situations. that damaged both engines. The pilots could not lower the landing gear and attempted to land on the aircraft’s belly. The plane slid off the end of the runway and hit a concrete wall about 2.4 metres high that held navigational equipment. The impact and fire killed everyone on board except two flight attendants.
The concrete wall was the problem. Most airports use lightweight, breakaway structures for equipment near runways, so that if an aircraft slides off the runway, it passes through without catastrophic impact. Muan’s wall was solid, reinforced concrete. According to a government-commissioned computer simulation, all 179 people who died could have survived if the wall had been made of breakaway materials.
What the Audit Found
The BAI audit, released in March 2026, found three failures. First, contractors built the barrier from reinforced concrete instead of breakaway materials to avoid the cost of levelling the sloping ground at the end of the runway. Second, according to the BAI report, Ministry of Land, Infrastructure and Transport officials certified the structure as compliant with safety standards for over two decades, despite knowing it did not meet requirements for breakaway design. Third, subsequent safety reviews never flagged the barrier as a hazard.
The problem was not limited to Muan. The BAI found 14 non-compliant navigational equipment installations at eight South Korean airports, including Jeju and Gimhae. The ministry has been instructed to fix all of them.
Why This Matters
Aircraft sliding off the end of a runway is not unusual. International standards require airports to maintain clear safety zones beyond the runway precisely because this happens. The question is whether the aircraft hits something solid or rolls to a stop on open ground. Muan’s concrete wall turned a survivable overrun into a fatal one.
South Korea has a painful history of disasters caused by construction shortcuts and weak oversight. The 2014 Sewol ferry capsize killed 304 people after overloading and structural modifications that regulators failed to catch. The 1995 Sampoong Department Store collapse in Seoul killed 502 people after the owner overruled engineers and added floors beyond the original design. The Muan audit follows the same pattern: someone saves money during construction, inspectors sign off, and safety reviewers leave the problem in place until it kills people.
What Happens Next
Criminal investigations are underway. The BAI has called for disciplinary action against three officials responsible for mishandling safety approvals at Muan. Families of the 179 victims have filed civil suits against Jeju Air, the airport operator, and the construction firms. A nationwide review of airport runway safety zones is in progress.
An audit by South Korea’s Board of Audit and Inspection (BAI) has found that cost-cutting during the construction of a concrete runway barrier at Muan International Airport directly contributed to the severity of the Muan airport disaster on December 29, 2024. The crash of Jeju Air Flight 2216 killed 179 of the 181 people on board, making it the deadliest aviation accident on South Korean soil. The audit report, released in March 2026, reveals that construction contractors reduced spending on the barrier’s foundation, that oversight officials certified the non-compliant structure for over two decades, and that safety reviewers failed to flag the deficiencies.
What Happened in the Muan Airport Disaster
Jeju Air Flight 2216, a Boeing 737-800 carrying 175 passengers and six crew members, was on approach to Muan International Airport from Bangkok when the crew reported a bird strikeA collision between an aircraft and one or more birds, which can damage engines, windscreens, or other critical systems and cause emergency situations.. Both engines were damaged, and the aircraft’s landing gear could not be deployed. The pilots attempted a belly landingAn emergency landing in which an aircraft lands on its fuselage without its landing gear deployed, typically when gear failure or damage prevents normal landing.. The aircraft overran the runway and struck a concrete structure at the far end: a localizerA ground-based radio antenna that transmits a beam along the extended centreline of a runway, giving pilots lateral guidance during an instrument approach. Part of the Instrument Landing System (ILS). mound housing navigational equipment. The impact and subsequent fire killed all on board except two flight attendants seated in the rear of the cabin.
The localizer mound was a reinforced concrete wall approximately 2.4 metres high. Its placement at the end of the runway became the central point of investigation almost immediately. Aviation safety experts noted that many airports use frangibleDesigned to break, crumble, or yield easily on impact; a structural design principle that allows objects near runways to fail safely rather than cause additional damage to aircraft. (breakaway) structures for navigational equipment mounts near runways, or install Engineered Materials Arrestor Systems (EMASEngineered Materials Arresting System: a bed of lightweight, crushable concrete installed at runway ends that collapses under an aircraft's weight to safely decelerate it during an overrun.), which are beds of crushable concrete designed to slow aircraft that overrun. Muan had neither.
What the Audit Found
The BAI examined the original construction records for the Muan airport disaster site and found that the concrete barrier was built below the specifications required by the original engineering plans. According to the BAI audit report, the construction contractor reduced expenditure on foundation work and materials; rather than levelling the sloping ground at the end of the runway to install a frangible structure at grade, contractors built the localizer on a raised concrete mound to avoid earthwork costs.
More damning than the original construction decision was the cover-up that followed. The BAI found that the Ministry of Land, Infrastructure and Transport (MOLIT) certified the structure as meeting frangibility requirements for over two decades, despite knowing it did not comply. According to Flight Global’s reporting on the audit, in 2013 the ministry chose to shrink the runway end safety area rather than remove the non-compliant concrete wall. Internal documents showed that concerns about the barrier’s placement had been raised informally within the regional aviation authority, but no formal review was initiated.
The problem extended far beyond Muan. The BAI identified 14 non-compliant localizer installations at eight South Korean airports, including Jeju and Gimhae, that had been wrongly certified as meeting safety standards. The audit called for disciplinary action against three officials responsible for mishandling approvals at Muan.
A government-commissioned computer simulation found that all 179 victims could have survived the crash had the barrier been constructed from frangible materials designed to break apart on impact. This finding transforms the Muan airport disaster from a tragic accident compounded by bad luck into something more specific: a failure of institutional accountability at multiple levels, from the contractor who cut costs to the officials who certified the result to the safety reviewers who left it in place for years.
The Barrier Problem in Aviation Safety
Runway overrunsAn incident in which an aircraft travels beyond the end of the runway and exits the paved surface before stopping. Clear safety areas beyond runways exist specifically to reduce the consequences. are not rare events. The International Air Transport Association (IATA) identifies them as one of the most common types of aviation accidents globally. The question is not whether an aircraft will eventually leave the paved surface at speed; it is what the aircraft will encounter when it does.
The International Civil Aviation Organization (ICAO) recommends that airports maintain Runway End Safety Areas (RESAsRunway End Safety Area: a flat, cleared zone beyond the runway threshold designed to reduce damage if an aircraft overshoots or undershoots during landing or takeoff.): flat, cleared zones extending at least 90 metres beyond the runway threshold and ideally 240 metres. These zones are meant to be free of fixed objects and grade smoothly to allow a decelerating aircraft to come to rest without catastrophic impact. Where terrain or space makes a full RESA impossible, EMAS installations provide an alternative: beds of lightweight, crushable material that progressively absorb kinetic energyThe energy an object possesses due to its motion. A mass moving at high speed carries kinetic energy proportional to its mass and the square of its velocity, determining its destructive capacity upon impact..
Muan International Airport’s RESA was shorter than the ICAO recommendation. The concrete localizer mound sat within the area where an overrunning aircraft would be expected to travel. The structure was rigid, not frangible. It was, in the terminology of crash investigation, a “non-forgiving” obstacle in a zone designed to be forgiving. The Muan airport disaster is what happens when that design principle is violated.
Several comparable incidents illustrate the difference. In 1999, an American Airlines MD-82 overran the runway at Little Rock National Airport during a storm, killing 11 people. The aircraft struck approach light stanchions and an ILS localizer, both of which were subsequently redesigned to be frangible at airports across the United States. The US Federal Aviation Administration (FAA) mandated EMAS installations at airports where full RESAs could not be built, and, according to the FAA’s EMAS programme data, no fatalities from runway overruns have occurred at EMAS-equipped US airports since.
South Korea’s Infrastructure Safety Record
The Muan airport disaster audit arrives in a country still processing the legacy of the Sewol ferry disaster of 2014, in which 304 people (most of them high school students) died after a ferry capsized due to overloading and structural modifications. Investigations into the Sewol revealed systematic failures in maritime safety oversight, regulatory capture by the ferry industry, and a culture of deference that discouraged safety complaints from reaching decision-makers.
The 1995 collapse of the Sampoong Department Store in Seoul, which killed 502 people, followed a similar pattern: construction shortcuts, ignored warnings from engineers, and regulatory failures. The building’s owner had overruled structural engineers who recommended halting construction and later adding floors beyond the original design.
These are not identical situations. The Muan airport disaster involved a specific structure at a specific airport, not a systemic industry failure on the scale of Sewol. But the audit findings share a common mechanism: cost reduction at the construction phase, inadequate inspection at the approval phase, and institutional inertia at the review phase. The pattern is not unique to South Korea; the Radium Girls case in 1920s America followed an almost identical sequence of corporate shortcuts, ignored warnings, and regulatory failure. The pattern is consistent enough to constitute a recognisable failure mode in South Korean infrastructure governance, one that successive reforms have attempted to address without fully eliminating.
What Happens Next
South Korean prosecutors have opened criminal investigations into individuals connected to the construction and oversight of the Muan airport barrier. The BAI has called for disciplinary action against three officials responsible for mishandling safety approvals. The Ministry of Land, Infrastructure and Transport announced a nationwide review of airport runway safety zones, including inspections of localizer mounts and other fixed structures near runway ends at all South Korean airports.
The families of the 179 victims have filed civil suits against Jeju Air, Muan International Airport’s operator, and the construction firms involved in building the barrier. Jeju Air has stated it is cooperating with investigations. The airline’s own liability for the crew’s decision-making during the emergency landing remains under separate investigation by the Aircraft and Railway Accident Investigation Board.
The Muan airport disaster will likely result in regulatory changes to South Korean airport construction standards. Whether those changes will extend to retrofitting existing structures at other airports, as the FAA mandated after Little Rock, depends on political will and budget allocation. As with the Boston Molasses Flood of 1919, where a court eventually held a corporation liable for a disaster it had dismissed as an act of God, the legal proceedings will test whether South Korean courts hold institutional negligence to the same standard. The cost of installing EMAS systems across South Korea’s network of regional airports would be substantial. The audit makes clear that the cost of not installing them was 179 lives.
