Adamuz train accident investigation focuses on rail fracture and track defects

Adamuz train accident Adif railway infrastructure Guardia Civil investigation track fracture

Investigations into the Adamuz train accident, which killed 46 people and injured over 100, have revealed conflicting findings regarding the cause of the derailment. A Guardia Civil report identifies a complete transverse fracture in the rail at kilometer point 318+681 as the primary anomaly. This break occurred at a weld joining two different rail sections: one manufactured in 1989 and another in 2023.

Judicial experts have proposed that a 6.4 mm leveling defect detected in October 2025 may have contributed to the failure. They suggest that as train wheels passed over this 'dip', it created a 'seesaw effect' that amplified fatigue damage at the weld, which is the weakest part of the structure.

In response, the state-owned rail manager Adif maintains that the detected 6.4 mm anomaly was well within European safety and comfort thresholds. Adif officials stated that the defect did not require immediate maintenance intervention, as it remained significantly below the 16 mm threshold for mandatory action and subsequent dynamic inspections also showed levels within permitted limits.

Entities

Adamuz · Adif · Guardia Civil · Junta de Andalucía · Ministry of Transport and Sustainable Mobility · Montoro · Oscar Puente

Claims

What the coverage asserts, and how many sources carry each claim.

[DISPUTED] The track breakage occurred at kilometer point 318+681. www.elmundo.es · www.surinenglish.com
[DISPUTED] The Adamuz train accident resulted in 46 deaths and over 100 injuries. www.elmundo.es · www.malagahoy.es · www.deia.eus · www.surinenglish.com
[● 2 SOURCES] The train accident occurred on January 18.
[● 4 SOURCES] Minister Óscar Puente dismissed reports of a new Guardia Civil report as a 'hoax'. www.surinenglish.com
[● 2 SOURCES] The Guardia Civil report indicates a track breakage caused the Adamuz train accident. www.elmundo.es · www.surinenglish.com
[DISPUTED] The breakage site involved a weld connecting track sections from 1989 and 2003. www.elmundo.es
[○ 1 SOURCE] A welder's report from May 2025 indicated an incorrect method was used to join the materials. www.elmundo.es
[● 2 SOURCES] Minister of Transport Óscar Puente stated that the rail sections have not undergone laboratory analysis nine months after the accident.
[● 3 SOURCES] The Guardia Civil report identifies a complete transverse fracture in the rail as the first anomaly detected. www.elmundo.es
[● 8 SOURCES] A 6.4 millimeter leveling defect was detected in October 2025. www.malagahoy.es · www.noticiasdenavarra.com · www.elmundo.es · www.informacion.es · www.deia.eus · +3 more
[● 5 SOURCES] Adif maintains that the 6.4 mm track defect detected in October 2025 was within European safety and comfort thresholds. www.noticiasdenavarra.com · www.informacion.es · www.diariodesevilla.es · www.eldiadecordoba.es · www.levante-emv.com
[DISPUTED] The rail fracture occurred at a weld connecting a track section from 1989 with one from 2023. www.elmundo.es · www.surinenglish.com