Aircraft stopping distance is critically dependent on runway length and weather conditions; when primary runways are closed for maintenance, aircraft must use shorter alternative runways, which significantly reduces stopping distance. Wet runway conditions further reduce braking effectiveness, creating a dangerous combination where even slight reductions in braking performance can cause aircraft to overrun the runway. This incident demonstrates that runway overruns in wet conditions often result from multiple smaller factors combining at the wrong moment, rather than a single major failure.
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737 Freighter Overruns Runway in BrazilAdded:
Welcome to Salvador, Brazil. Welcome to Salvador, Brazil. It’s 7:27 in the morning on May 9th, 2026. It’s 7:27 in the morning on May 9th, 2026. Approaching the airport from São Paulo is Gol Cargo Flight 9618, Approaching the airport from São Paulo is Gol Cargo Flight 9618, operated by a Boeing 737-800 freighter. operated by a Boeing 737-800 freighter. Weather around Salvador this morning has been unstable, Weather around Salvador this morning has been unstable, with passing rain showers moving across the airport. with passing rain showers moving across the airport. And with the airport’s primary runway closed for maintenance, And with the airport’s primary runway closed for maintenance, arriving aircraft are being forced onto a much shorter runway. arriving aircraft are being forced onto a much shorter runway. Minutes later, the 737 overruns the end of the runway after landing in wet conditions. Minutes later, the 737 overruns the end of the runway after landing in wet conditions. Fortunately, both pilots escape without injury. Fortunately, both pilots escape without injury. Normally, jet arrivals into Salvador use runway 10/28 — Normally, jet arrivals into Salvador use runway 10/28 — a runway just over 3,000 metres long. a runway just over 3,000 metres long. But NOTAMs issued for the airport show But NOTAMs issued for the airport show that runway closed between 0940 and 1040 UTC for maintenance. that runway closed between 0940 and 1040 UTC for maintenance. The overrun occurred at approximately 1029 UTC, The overrun occurred at approximately 1029 UTC, right in the middle of that closure window. right in the middle of that closure window. That left arriving crews with runway 17. That left arriving crews with runway 17. At just 1,518 metres long, it offers barely At just 1,518 metres long, it offers barely half the stopping distance normally available. half the stopping distance normally available. For a Boeing 737, especially on a wet runway, For a Boeing 737, especially on a wet runway, that leaves a reduced safety margin. that leaves a reduced safety margin. Weather observations throughout the morning show Weather observations throughout the morning show repeated rain showers and fluctuating visibility around the airport. repeated rain showers and fluctuating visibility around the airport. Just 12 minutes before the overrun, visibility had Just 12 minutes before the overrun, visibility had dropped to 2,000 metres in rain and mist. dropped to 2,000 metres in rain and mist. Although conditions improved somewhat by the time of landing, Although conditions improved somewhat by the time of landing, showers were still reported nearby. showers were still reported nearby. With temperatures and dewpoints almost identical throughout the morning, With temperatures and dewpoints almost identical throughout the morning, the runway surface was likely extremely damp. the runway surface was likely extremely damp. On short runways, even a slight reduction in braking effectiveness On short runways, even a slight reduction in braking effectiveness can dramatically increase stopping distance. can dramatically increase stopping distance. Exactly what occurred during the landing roll remains unclear. Exactly what occurred during the landing roll remains unclear. No flight data or cockpit recordings have yet been released publicly. No flight data or cockpit recordings have yet been released publicly. But runway overruns in wet conditions often follow a familiar pattern. But runway overruns in wet conditions often follow a familiar pattern. A fast approach. A fast approach. A touchdown further down the runway than intended. A touchdown further down the runway than intended. Or reduced braking performance after landing. Or reduced braking performance after landing. On a runway this short, there may be little opportunity to recover On a runway this short, there may be little opportunity to recover once stopping distance begins to disappear. once stopping distance begins to disappear. At approximately 1029 UTC, Gol Flight 9618 touched down on runway 17. At approximately 1029 UTC, Gol Flight 9618 touched down on runway 17. But the aircraft was unable to stop before reaching the end of the pavement. But the aircraft was unable to stop before reaching the end of the pavement. The Boeing 737 continued beyond the runway surface before finally coming to rest The Boeing 737 continued beyond the runway surface before finally coming to rest around 45 metres past the runway end. around 45 metres past the runway end. Following the incident, runway 17/35 was closed due to the disabled aircraft. Following the incident, runway 17/35 was closed due to the disabled aircraft. A subsequent NOTAM confirms the runway remained closed A subsequent NOTAM confirms the runway remained closed for several days afterwards. for several days afterwards. No injuries were reported. No injuries were reported. Investigators will now examine the aircraft’s landing performance, Investigators will now examine the aircraft’s landing performance, braking effectiveness, weather conditions, and touchdown point braking effectiveness, weather conditions, and touchdown point to determine exactly why the aircraft was unable to stop on the runway. to determine exactly why the aircraft was unable to stop on the runway. While modern aircraft are equipped with highly capable braking systems, While modern aircraft are equipped with highly capable braking systems, wet runway overruns continue to occur worldwide — wet runway overruns continue to occur worldwide — often caused not by a single major failure, but by several smaller factors often caused not by a single major failure, but by several smaller factors combining at exactly the wrong moment. combining at exactly the wrong moment.
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